Pregnant????? Please help!

Can Toddlers, more specifically my 1 yr old niece, tell when someone is pregnant before they know them self? Cause like, I’ve heard that they’ll pay more attention to your boobs if you are and she definitely pays them no attention and she definitely paid attention tonight. She wouldn’t stop touching them and saying “boob?” And she kept poking my stomach. ( I am overweight so I look a tad pregnant sometimes) but like she usually never does this stuff so I’m concerned and don’t have a way to take a test at the moment.... is any of this a real thing?? Please help!!