How to Do It is Slate’s sex advice column. Have a question? Send it to Jessica and Rich here . It’s anonymous!

Dear How to Do It,

I came home from work early one day and found my wife in bed with another woman.

Although I was initially furious, having a threesome with her and another woman has always been my ultimate fantasy, and in a moment of weakness, I accepted their offer to join them.

Now my wife wants to set up an official session for the three of us. Ridiculous as it sounds, I don’t want to have a repeat of it. I’m willing to forgive my wife so long as this doesn’t happen again. All my friends say I’m out of my mind. Am I letting an amazing thing slip through my fingers?

—Is Three a Crowd?

Dear Is Three a Crowd,

This does not sound ridiculous to me at all.

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