Hand history isn't accepted so I'll type it out. It's a short situation anyway.

6-max 100NL, Effective stack is 102BB from Hero.
Hero has QQ.
UTG folds, MP opens to 2.1BB, CO raises to 7.8BB, BTN folds, Hero?

This seems like a though situation. 4-bet without stats here seems hard, especially since we have to call off 5-bets. Flatting the 3-bet gives MP the option to squeeze or get in the pot which leads to 3-way OOP. And folding seems nitty.

I 4-bet but am curious about the spot.