what sucks is that you're turning a +EV spot PF into a -EV spot if you're going to float someone's 3betting range at 5nl on this flop.

Instead of calling with 88 PF getting some nice implied odds you can now tack on an additional 25bbs if you're going to continue, thus slashing your implied odds.

You cannot have it both ways in my mind, you called PF b/c you thought his range was basically QQ+ and you felt you could win a big pot had you hit a set. However, you cannot then widen his range post-flop because you don't feel like folding.