Baby sister-in-law

I think talking to your sister-in-law is the only option, to let her know it bothers you. But you can't force her in the end; it's her baby. I get that it's not nice, but everyone deals with things in their own way. Maybe she doesn't even realize she's doing that, so I'd say talk it over with her and your in-laws together.

"It's done."

Now I'm really curious how it actually turned out? Are you done with trying to contact them, or is it resolved and is your sister-in-law acting 'normal' now?

Oh wow, that was quick..