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.

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 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.

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.

read the OPs username