Yeah, totally. Though I wouldn't be surprised to hear that a rich aunt or uncle was helping out - that's happened multiple times within my acquaintance, or to people they knew - even to my mom on a smaller scale. But grandparents helping is a frequent thing whereas the idea that the uncles and aunts would feel obligated seems a little foreign. I mean, it wouldn't happen in my family, either side, both American but different backgrounds. And it wouldn't happen to either side of my inlaws, both Finland Swedish, either. Helping out, yeah, but it's always at the offering aunt or uncle's instigation; nobody in the family would condone the idea that they were obligated.