This must be the strangest post, but my sister-in-law asked me (through my wife), if I would be willing to donate NI (natural). She knows I'm clean, respectable, 30's, educated six figure professional. She just doesn't trust any other way, and AI is very expensive. I suggested a website or app, but in no way will she do this with a stranger.

I've never even glanced her way. I mean, she's a stunningly gorgeous yoga instructor (so is my wife, though a nurse), but with the whole married to my wife, it wasn't even a remote thought in my mind.

What is the smart decision? My wife is really encouraging towards it.

In fairness, if my wife couldn't get pregnant, she would have been gladly a surrogate. And yes I get all the legality aspects, that's not my concern.

This is not about anything sexual or about attraction so i don't understand why you started making comments about her being attractive. It's not about that at all. She is not remotely interested in you like you are thinking. She has just asked you to help donate for her to have a child because you are a good guy. If it feels too weird for you then you have every right not to do it. It doesn't matter what your wife encourages. This is your decision. But definitely don't think of as any sort of cheating.