I really can't believe you're not betting that flop with 78s. What else are you checking here? Personally, I think I bet my entire range. I mean, I raised pre, it's Kxx 2tone. Yeah, I think I even bet my 88-QQ here, I don't want to turn those hands face up and am delighted to see a flop fold. Further, flush draws call, we're in position and can check back turn, and can call rivers to catch bluffs.

We simply must bet this flop. It's far too strong a hand to play passively.