That's not a stomach. If so that chest would be to spaces higher (sry if i am wrong) Also You might think because she's looking down at her stomach, and technically Blushing? Eh, no proof to me, just pointing out.

Frankie: omg I’m not pregnant!!!!!!!!!! Lydia!!!!!!!

The bump on the stomach, a clear mistaking for the chest. I'd advise you to put the chest-area where it should be. Is it really that hard?

What makes you think that Lyddia?

Is she pregnant??