I know her being my sis-n-law isn't technically incest but she is young enough to be my daughter and unlike most stories in here it is 100% real and just happened a few days ago. Let's set the stage. My wife and I (m48) met up with her whole family in her parents small cabin in the mountains celebrating her youngest sister's (23) college graduation. It's a small and tight little beautiful cabin on the side of an appellation mountain. We spend our days riding atvs and having fires and relaxing. The only thing is its hard to get privacy so being there over a week I was needing some release. So the other day I declined to go on a trail ride with the whole family just get a jerk off session in. About 15 min after they left I laid back in the lower bunkbed the wife and I was sharing and got to it. A few minutes into it laying there with my eyes closed pretty close to closing the deal I hear "Shit, sorry" it was my sis-inlaw standing right there looking at me, apparently her atv had ran out of gas not too far off and her parents decided to take their empty gas can down the mountain to get it filled and instead of waiting for them alone in the woods she just walked back to the cabin... I was profusely apologizing and explaining I thought I was gonna be alone and that me and her sister haven't been able to be together etc etc.. she got a kinda devilish look on her face and just said lay back. So I did she reached in side my gym shorts and pulled out my half limp dick which started hardening again instantly and started blowing me. I'm not sure if it was because I was so close before to cumming or the excitement of it being a beautiful young girl or what but I let loose in her mouth a giant gush ... so much it shot from her nose. She wiped her nose and chin off and busted out laughing. She said" that was embarrassing" and that this will be our secret and her sister would kill her.

Just left the cabin on our journey 12hr home. As we all hugged goodbye she whispered "Your Welcome" in my ear and laughed... still feels unreal..