Forbidden Letter

My wife Alex only has one sister who lives 4 hours away. Their Mom Kate has been divorced since they were little and never remarried. She basically swore off men and focused on raising her two girls on a meager salary.

I was always impressed with how she managed to raise two successful ladies all by herself while working full time.

The girls definitely get their looks from Kate. She has always kept her body tight so her small c cup breasts remained firm. I rarely saw her in makeup but she was naturally pretty and really didn't need it.

Being the only man in her life most of the heavy lifting jobs fell to me. I didn't mind. Kate was nice to me (which was good because she kept a low opinion of men in general).

It also made Alex happy that I took care of her mom so she made sure to take care of me. I was also good with that payoff.

One of my seasonal duties is the window AC units. Kate lives in a very old house with no central air. The plaster locks in the heat and gets unbearable as the season warms up.

Alex asked if I would stop Friday on my way to the office and put Kate's window units in for her. It was already unseasonably warm and calling for a really hot weekend.

I told her no problem. I was already planning on stopping by to move some dirt as Kate requested. I could just do it all at once.

Come Friday I packed my work clothes figuring I would just change at Kate's after getting dirty making it easier to get to work.

I got to Kate's pretty early and it was already getting very warm. I moved the bags of dirt from her garage to the garden and headed in to work on the AC units.

Kate was busying herself around the house as always. She hated asking for help so felt the need to alway be working if someone else was doing work for her.

I let myself in as usual. Kate learned to trust me over the years and because of that felt more comfortable asking me for help. Alex and I were there often cooking dinner and doing projects. Kate liked to tease that I was the "last good man" because I held doors and alway took really good care of her daughters.

I made my way up to the attic to get the units. Whew....scorching hot.

I carried two to the main level and popped them in and got the running.

I headed up to Kates room with the third. I don't know how anyone survived sleeping upstairs in these old house before AC. It was ridiculously hot already and it was just Spring.

Kate appeared from the spare room as I topped the stairs. She greeted me with a smile and moved to clear the way to the window for me.

I couldn't help but notice how tight her ass was in her small running shorts. They were thin material that just reached below the curve of her ass. Her tight t-shirt hugged her breasts. At her age it was amazing that she still didn't need a bra and in this heat she wasn't going to be bothered with putting one on.

I installed the AC and fired it up. By now I was dripping in sweat. Kate took one look at me and said.

"Awe, Tyler. You can't go to work like that. Go jump in the shower before you change and rinse all that sweat off. I have some fresh Ice Tea in the fridge before you go." Kate threw me a towel and pointed down the hall.

I didn't think much of it because I had showered at Kate's many times over the years. I knew where everything was and realized it would definitely cool me down.

When I came out of the shower I heard Kate's voice coming from her room. She sounded in distress? I quickly wrapped a towel around me and headed down the hall to see if she was okay. When i got to her room she was clinging to the AC unit for dear life as it dangled out the window.

I ran to the window and grabbed it from her.

"I'm so sorry Tyler." She was embarrassed and apologizing. "I unscrewed the anchors to adjust the cord and it started to fall out the window. I should have left it alone."

"It's no problem Kate." I reassured her. "Just hand me that screwdriver and I'll get it secured."

Kate just stood there like a deer in the headlights staring at me with her mouth open.

"Kate!" I tried not to bark. "The screwdriver, can you reach it for me."

My hands were occupied with the Unit so I watched as she fumbled around reaching for the screwdriver, never taking her eyes off of me.

She finally handed it over and I was able to get the unit lockdown. I glanced over at Kate and she was still staring at me, her eyes glazed over like she was lost.

"Are you okay?" I asked.

"Uhh..yeah. Sorry...Oh. Sorry." she said as she snapped her shoulder around and faced away from me.

It was then I realized that I had slipped my towel while wrestling with the window unit. My penis was almost 7" flaccid and pretty thick. It dangled in front of me offensively right in front of Kate.

It was my turn to apologize. "I'm so sorry Kate. I didn't even realize I had slipped my towel. My bad." I said as I wrestled to get the small towel around me.

"No no. I'm sorry. I should't have stared. I guess it's been 20 years since I've seen a penis so I kind of froze."

Wait, what? She hadn't seen a cock in 20 years? That seemed crazy. She was an attractive older woman in great shape. We just figured that she always kept her private life actually private.

"It's no big deal Kate. You had two girls so I know you've seen a penis before...haha." I tried to lighten the awkwardness in the room.

"Well, maybe I have but not like that one." She was facing me again now that I was covered.

"Your's is different than anyone I've ever seen. No wonder my daughter is always smiling." She tried to help as well ease the tension.

As she spoke I could see her nipples driving through her tight shirt. Wow, she did have amazing tits for an older lady.

Then it happened. Between the awkwardness and the sight of her hard nipples, my cock started to fill with blood. I could feel it starting to tent in my towel.

I looked back and Kate and she was now locked in on the sight of my now semi hard cock pushing out my towel. I swear I saw her lick her lips.

"Sorry Kate. I guess the excitement got over me." I giggled nervously

"Oh, it's fine Tyler. I shouldn't be looking at you it's just.....I didn't know they came in that size. I guess I've been out of the game way too long." Her breath was heavier as she spoke. Her eyes still locked on my cock.

My heart was pounding. Her breasts were heaving as she spoke. This could turn out really bad if I said the wrong thing but I couldn't resist. The tension in the room had my blood pumping.

"Kate." I said quietly. "Would you like to see it? If it's been 20 years I have no problem showing it to you."

"What? Oh...uh." She stammered.

Oh shit. I overplayed my hand. She's going to kick me out and call my wife. I will go down as the sick son in-law that perved on his wife's mother. Alex will kill me.

Before I could say a word Kate spoke up.

"Actually, um....I am kind of curious. It has been a lifetime and this might be my last chance."

With that I dropped my towel to the floor except this time my cock was crossing above half mass with the blood quickly filling it up.

"Oh my" Kate gasped. "That is really beautiful! Does it......does it get bigger?"

My cock continued to grow thicker and longer the more she stared. It was now pointing straight up the air like a tower.

Kate's cheeks were beet red. Her breasts were heaving as she shifted on her feet watching it grow.

"Holy cow!" She panted. "I guess that answers my question, Wow!"

I stood there awkwardly with my cock swaying in the air Kate drank in the sights in front of her. I was beginning to feel like a zoo animal but my libido was starting to fire up from the attention.

"Would you like to touch it?" I said shyly. This might be pushing it but I had to know.

Kate stood froze for a few seconds. Then without speaking she slowly stepped forward and gently wrapped her hand around the base. She held it firmly as the weight of my cock swayed in the air. I could smell the sex pouring out of her.

When she spoke I knew the temperature was changing.

"This is the first time I've held a hard cock since the girls father left."

Just hearing prim and proper Kate say the work cock about sent me over the edge. She was working her thumb lightly back and for across my thickening shaft.

Her nipples were now completely visible and sword I could see a small wet spot growing in the seam of her shorts.