[Ampelmann]

Hand 1: By just calling the flop you're actually giving MP2 pretty good odds to draw to a flush. I'd just raise. I want value from SB. He may be on a flush draw after all.

Hand 2: It's fine. I don't fold QQ to an all-in from a half stack unless I know he's only making that play with AA or KK. The way you described him he might have AK or JJ, or even worse. Just calling is not a good idea since you'll have a hard time to play when an A flops.