It's been a while since I've posted a story so here's a quick one that I hope you enjoy.
So it all started when my mother in law was sitting across from me while I was horny one day at the cabin. I was there alone until her and my father in law showed up. I was just wearing my sleep shorts and a tee sitting on the couch sprawled out relaxing when they walked in. I didn't move. I just sat there while she sat and he went about doing something outside. We exchanged some conversation before she began playing games on her notepad, and I just went back to watching TV.
They're both nice people that I get along with very well, and for a woman in her late fifties she's not bad to look at. I've definitely liked her rather large chest from day one. She has to be DD at a minimum. Today being overly horny and being alone all week my thoughts were more on her tits than the TV. It's not long until I'm stroking my dick letting my shorts ride up so she can see.
I glance at her occasionally as the tip of my hard dick pokes out for her to see, and I see that she's stealing glances. This gives me the courage to show a bit more so I pull my shorts to the side letting my cock and balls free while I stroke my shaft while watching her from the corner of my eye. I see her rubbing her right thigh while she watches and pretends to play games.
My cock is rock hard when I see her finger slip into a hole in her jeans near her crotch. Her hand moves slowly up and down telling me that she's rubbing her clit with my rhythm. Her legs open and her hand moves deeper into her pants. I hear a faint moan before I grab my cock firmly to stroke it properly. I don't say a word as I turn to watch her.