How could she not tell, or know??

See the op's username.

Maybe the mother in law was giving her a back door compliment? Perhaps OP didn't look pregnant until she did the back-press.

The in law is probably in denial.

She just wanted to be an asshole.

I think the its the opposite. She complimented her on how she LOOKS pregnant, implying she isn't. Basically she said she is thin.

'Thin' and 'pregnant' don't go well together, especially in the third trimester. They'd have an underweight baby and that isn't healthy.

I guess she wasn't wrong, but what an asshole.

Um isn't that better than if you weren't pregnant? Plus she's your in-law, shouldn't she know you were pregnant? Sorry don't see how this is really an FML....

I know it's unlikely but I kind of got the feeling that OP and mum-in-law don't see each other much and OP assumed her husband had shared the news but, for whatever reason, he hadn't? Or the mother-in-law is joking because she's denying that she's pregnant (I know someone who's grandparents actually did just deny the pregnancy and pretended she didn't exist until she was about 20). If either of those were true, that would be pretty FMLy.

That seems very rude from your mother in law. You could have told her to catch up on the family news and not to be so mean next time. I bet you she knew but wanted to piss you off.

Based on your username, the only other logical conclusion I can come to is that she's a complete fucking moron.

I agree... What a Bitch. You know what i mean OP.

Perhaps it was just a lame attempt at humor by the in-law.

I hope so, #29. I hope so.

She doesn't know she's gonna have a grand kid?

read the OPs username

Even if she didn't, this just shows the infinitely deep well of knowledge that is OP's mother-in-law.

OP's username says she knows

Don't mess with a pregnant woman!