Ben's going full CSI on his iPad, connecting the dots:

Mom got messed with in America

Bad dude dragged her back home

Mom suddenly decides to stick around

Mom's making clothes for Sam

Gets roughed up by security because of him

Treats Sam like he's her own kid...

Hold up. Ben's brain just short-circuits. What if Sam IS Mom's kid?

But why keep it from him and Isabella? This puzzle's got more pieces missing than his dinosaur ...