I really want to raise this turn, but I'm not sure why. Hmmmm....
$25 into a $181 pot is almost always a weak blocker bet. His bet is only around 14% of the pot.
At this point, we likely have a pretty decent equity advantage over their ranges. There's $231 just sitting in the pot. If we raise small...like to $65 total, that wouldn't blow them off their garbage. If they're calling $25 on the turn, they'll likely call $65. The only danger is getting 3-bet/blown off our draw, but two pair is very unlikely on this board and it's hard to imagine a set betting so small.
Maybe their range is something like this:
K7s+, KJo, KQo, 44-TT, a few gutshots, maybe A
9
, maybe some J9s, T9s that peeled one off and wants another cheap one.
What would they call $25 that they wouldn't call another $40 on the turn? We've got an equity advantage over their range, so might as well get $ in the pot now. The weaker part of their range isn't likely to fire again on the river against 2 Vs unless it hits. They're not betting the turn as a bluff. They're betting to keep from having to call a larger bet.