I would TOTALLY send her a friend request on facebook LOL
Just tell her the kid told you. It's disrespectful that she still hasn't told you. It's a little ridiculous actually. I have a mom who just told me this morning. She's 20 weeks, which seems a little long to have waited to tell me but the little boys has only been here for 2 months, so I understand why they didn't tell me. She's being totally disrespectful. I wouldn't give it more time bc it's clear she's not going to tell her.

Since you KNOW she's pregnant, don't worry about insulting her if you say you've noticed. It's not like she's going to turn around and tell you she's just fat lol if it's obvious, then say something. You have a right to protect your business