I was at my mother-in-laws house and she began feeling a little light headed. She suggested we go to a walk in clinic to have her checked out. As we are driving there she is becoming weird almost like she is drunk. She had one glass of wine when we ate and I didn't think that it would affect her like this. We get to the clinic and she mentions to them that she is very light headed but is acting like she is drunk. They ask me how much she has had to drink and I told them just a half glass of wine. They asked who I was and my MIL told them I was her son. They brought both of us to an examination room and told her to take everything off and put on the gown they gave her. I was told since I was her son to stay and help her as it appeared she would need it. I didn't correct them to tell them I was not her son but her son-in-law. The room of the door closed and there I was with my MIL and not knowing how she was going to take this. First thing she does is tries to take her own clothes off but was not able to and tells me to get to it. It appeared almost like she was drunk and getting drunker. I began to remove her dress and she full cooperated. I always wondered what my MIL looked like naked and I was about to find out shortly. I took off her pantyhose next and at the same time pulled off her panties. I got my first look at her uncovered pussy and it was completely hairless. Next I removed her bra to have a very nice set of huge tits fall out. She was fully nude now and didn't care at all I was seeing her this way. She then tells me to take my pants off, and spreads her legs with her fingers opening her hole, and to stuff my cock in. It was tempting but I knew I couldn't take advantage of her like this and put the gown on her. The doctor comes in and begins to ask questions. To make things short, it turns out her doctor had recently changed her medication and with the new medication you are not suppose to have any alcohol with it. The medication can increase the effects of alcohol up to 20 fold so the wine she had caused her to basically get very drunk. The doctor told me to just take her home and have her sleep it off. He also mentioned she will most likely get more drunk before she gets sober. She didn't want to get dressed but I managed to at least get her dress on to get her home with some decency. As soon as we get through her front door she strips of her dress and begins to try and pull my pants down. I fight her on it and she tells me if I do she will do anything I tell her to. I figured it would make things easier and she would be passing out soon anyway. I pull my pants down and she says to take them all the way off so I did. She then says everything else has to come off too. I figured, what the hell, and off came everything. She walks up to me and drops to her knees and begins sucking my cock. I tried to pull her away but she wasn't letting go and it wasn't feeling so bad so I figured to just let her do it. To my surprise she stopped before she finished and told me she had to lie down and to come with her. We both lay on her bed and I was waiting for her to fall asleep. A minute later she is moving on top of me and rubbing her pussy against my cock. I was in shock and before my shock wore off she had my cock in her fucking me. I should have stopped it then and there but it was feeling a little too good to stop her so I just let her continue. We finished and she fell asleep for a bit. I was worried about what my wife would think and what my MIL would think once she realized we fucked. She wakes up a little later and pulls out a dildo and begins masturbating. This time she falls asleep for a few hours and when she wakes up asks me what happened. I explained the wine and medication and going to the medical clinic. She didn't remember any of it and asked why her dildo was out. I mentioned she used it and her first question was if I saw her use it. She said she assumes I saw her naked. I told her I did at the clinic because I had to help undress her for the doctor and when she used the dildo. She asked to not mention this to anyone as it was very embarrassing. I agreed and I made no mention to her how she basically jumped on top of me and fucked me. I don't think she truly knew she did that and I wasn't going to bring it up because my wife would probably kill me. My MIL did mention how she was sore between her legs and just chalked it up to being a little rough with her dildo. It was probably a combination between the dildo and me.

Since then my MIL doesn't seem too concerned about her nudity around me when just the 2 of us are alone.