I had just arrived from home and found my fiancé lying on the bed with a towel around her waist, and nothing underneath. I first thought she was just sleeping, I came on to her and started touching her. She refused a several times (which was weired), eventually she opened her legs and responded, asked me to switch off the lights which I did, we had sex. When we finished I asked her to sleep under the duvet, and she did, I switched on the light, and I was like she was seeing me for the first time second time, she did not even know she's just had sex, and she was just happy to see me. That means she could have been having sex with anyone and would not know a thing. Has that happened to you? Is it normal?