I dunno if I'd generalize it to "Europe". Here (Poland), at least with my parents generation there is really no such expectation, the "giving back" is just invi

I dunno if I'd generalize it to "Europe". Here (Poland), at least with my parents generation there is really no such expectation, the "giving back" is just inviting them on a different occasion. Bringing anything extra of course happens but it was strictly optional and often just "look at what tasty stuff I made', like a bottle of home-made alcohol or some smoked ham. On some occasion like christmas it was often coordinated beforeand, like we all go to christmas to a certain relative but everyone was bringing some specific christmas dish, as to avoid any duplicates.