Have you ever slept with your friend's spouse?

I've been hitting my friend's drug addict wife for 7 months. After they were married he stop speaking to all of his friends. I warned him that she was on drugs and he stop speaking to me for about about a year. Then one night I seen his wife outside of a bar. I pulled my car up to ask her how my friend was but she didn't recognized me. I had only met her a few times plus she is a junkie. She asked me to hang out with her and I did. I inadvertently banged her all night while she used drugs until she passed out. Even though now him and I are on good terms, I still keep hitting her and she don't know still that I know him.