the fact that he PRE-selected an overbet amount of chips and the fact that he had to "wait and think" for a while before putting in the 190 shows EXTREME weakness to me.
Raise this bet.
my read is that the villain spiked an ace, but he's worried about why you called $40 on the turn and he thinks you might have AJ.
This is effectively his method of using a blocking bet because you're not going to raise it unless you have something much stronger and you won't call unless you actually do have 2 pairs.
If you get raised after this, then you can only be facing Q
10
and you were beat all along.
However i highly doubt this