Sister in law

[Jaandaj]

That's the hard part right there I don't want to approach her about sex not know how she will react all I can do is flirt and wait till she comes to me about it. No men will understand women, sometimes they don't even understand themselves

It's definitely a slippery slope. And would definitely be hot as hell to do the SNL.

I would just keep up the playful flirting. If she ever makes a move back. Then have to make serious choices.
As for your wife. Choice is up to u. Myself I would tell mine. But I know how she is and know it wouldn't bother her.

If you tell her, be companionate. Something simple. " Honey I didn't want to tell you because I didn't want her to be embarrassed, but I once walked in on ur sister. It was accidental and she was pretty shocked." It may work it may not !