<human>: Summarize the given text in a few sentences.

We've been married 3 years. My wife's not a physical person. Says she feels stifled if I hug her and doesn't like me to hold her when we sleep together. 

It's missionary position during sex and no kissing, foreplay, breast play or oral sex (giving or receiving.) During penetration, she just lies there. She refuses to discuss our sex life. Just giving this information for context, not to justify what I did. 

After a family death, I really needed some warmth, some human contact. But I couldn't get that from her. The night after the funeral, I wanted to hold her in bed but she told me not to be "clingy." 

 A few weeks later, I bumped into my ex. When I told her about my dad's death, she was really warm and comforting. We ended up having a couple of drinks together and then screwing like bunnies. 

I've never cheated on my wife before. I feel guilty as hell. Not sure what to do or how to tell my wife about this.
<bot>: Wife's never been physical or sexual. I needed human contact after family death. Couldn't get it from her and ended up sleeping with ex. Don't know how to tell my wife.