Sister & Brother-inLaw

[Rogers1]

I know what two consenting adults do is there own business but this could cause big family issues if this 'friends with benefits' goes wrong. What shall I do....if anything?

Nothing, unless you are the one cheating and then you should confess.

No it's not me...it's my sister & husband's brother (no cheating involved...both single). Just very worried of the backlash as she wants a relationship & he doesn't so is settling for 'friends with benefits'. Me & DH are keeping out of it...until my sister calls & I get the impression one minute she is fine with the 'arrangements' the next minute it seems she wants more from him.