My family went out for fun. My wife and I were in the middle of something when her younger sister dragged her off to go shopping, leaving...

My family went out for fun. My wife and I were in the middle of something when her younger sister dragged her off to go shopping, leaving me alone in the room, feeling frustrated and with an erection. Just then, my mother-in-law knocked on the door and came in, saying she knew I was alone and wanted to check on me. I told her I was feeling uncomfortable halfway through, and she gently took off her underwear, climbed onto the bed, and started licking me. My penis was covered in her daughter's fluids. With a mother-in-law like that, I can never leave her daughter for the rest of my life.