I fucked my mother-in-law. She stayed over with me and my wife for a whole week and one day it happened. I get home late from work to see someone laying in my bed and the shower going in the bathroom. The house was dark but the baby was asleep so I kept the lights off. Being my bed I think its my wife so I go in and I kiss her only to realize after I've kissed her its not my wife. Embarrassed I jumped up and apologized. But Before I could get out any full words she jumps up and kisses me again. She told me my wife just got in the shower then she knelt down and undid my pants. Next thing I know I'm on the bed getting my dick sucked. I could take the pressure anymore and I came in her mouth. She then looked at me and said, "Now we gotta restart." Then she stripped down and laid across my body rubbing in my hard pulsating dick. At this point I didn't care I fucked the shit out of her and came in her pussy twice. Finally my wife got out the shower and we hurried up and got dressed and went to the den like nothing happened. A few minutes later my wife comes in the room and plants a big one on me. She knew nothing. Being super excited how we got away with it, me and my mother-in-law keep hooking up to this day. We play the whole part like we don't care much about the other and EVERYONE is oblivious. My wife and father-in-law have no clue what goes on. My son now stays with my in-laws a lot so when I go to pick him up, we tell him "Go to the room and play while me and Nana talk." He goes in there and me and my mother-in-law have sex. I cum in her every time