With suited overcards (not an ace) and a straight flush draw on a paired board against a low pocket pair, I think you are right it's 25 on the turn.
like:
QhKh vs 3s3d
Flop: Jh4cTh4d
Gives you both your cards live for pairs K&Q - 6
All the hearts but 3h and 4h - 7
The other three nines and aces... - 6
The other tens and jacks - 6
Is this right??? Trivia/math wizards chime in?