I am 99% sure W parents don't know about our S. They dealt with a brief seperation earlier this year and are back together and seemingly happier than ever. They would probably be very upset and against D if they learned about it. Should I approach maybe my father in law for advice? Or is that seem like manipulation on her part? I almost feel like if they knew they would talk to her and advise her to work on the R. Does that not work because she didn't initiate it? Or could a push in that direction be helpful.

Any advice?