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,

Two nights before her wedding, my best friend and I got drunk.

We ended up sleeping together. When we sobered up, we both agreed it was a mistake. The trouble is that we’ve made more than a dozen “mistakes” in the year since she got married.

She recently told me her husband revealed a fantasy of having a threesome with her and another woman, and asked if I would be OK with her suggesting to her husband that I join them. That would solve a lot of problems, but it would be kind of weird. Should I decline, or is this opportunity to get the green light for our activities too good to pass up?

—Hall Pass

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