nl100 spots to fold overpairs?

[Wi11i]

UTG who is pretty new to the table raises to $4, folded to me in the BB and I re-raise to $15 with :kh :ks. UTG calls. He has $110 and I have him covered.

Flop comes :7h :7c :8c

I bet $18 and he miniraises.

Hero...?

Shortie donk with $12 limps UTG, folded to me and I raise to $5 with :ad :ac on the button. BB who's running at 25/13 calls as does shortie.

Flop comes :6c :6s :7h rainbow.

Both check to me and I bet $11. BB now mini-raises and shorty calls off his last $7. I call.

Turn is a :5h, putting a flush draw out. BB bets $20, he has $61 left behind.

Hero...?