I have been flashing my mother in law. I’ve been so h**** the last few months and recently went to stay with my in-laws on my own for a few days on business. I’d fantasised about this in advance so had taken appropriate clothing, a pair of pajama bottoms that were very thin which when pulled up high cling tightly at the crotch. I spent as much time as I could wearing these pants and as soon as my father-in-law was out of the room I would very obviously eye up my mother in law. She’s a short but fairly fat, maybe 250-300 lbs, her a** is huge, she has sizable t*** and never wears a bra. We would be watching tv and I would sit with my body turned away from the tv and facing her. She would turn to look at me in conversation and I would let her catch me staring at her t*** and her a**, slowly looking up to make eye contact. She loved it, getting very flattered to be eyed up. I let my c*** grow to full erection and would then wait till she was looking directly at me to twitch it as hard as I could. This would go on for hours each day, everytime my father in law was busy somewhere else in the house. She’s usually a very lazy woman and ask me to get up and light candles, close doors etc. This weekend she took every opportunity to get up and give me a good look at her big a**. At one point she went to make tea and I followed her into the kitch, my c*** pitching a very obvious tent. We talked for a good 5 minutes about changes she wanted to make to the house. I would look away from her and try to imagine the changes and when I turn back catch her eyes quickly darting back up to my face after she’d been checking me out. I don’t think she and my father in law have had s** for decades, probably because she feels so unattractive. Next time we’re alone and I can give her a good night hug I’m going to slip a hand down onto her a** and see how she reacts, I may even give her cheek a lil squeeze if I’m feeling bold, and I’m already a very bold guy lol.