A quick TD deuce question

This may be a leak but I always defend my big blind with any 3-draw that contains a deuce and can still make the nuts. It creates some interesting situations after the first draw.

- Lets say I defend against a button raiser who plays well, is aggresive, and will draw pretty rough in heads up pots. I start with 27. He choses to draw one (which could very well be 3679 as he has done often before) After the first draw I end up with 257. Is it correct (with 4 little bets in pot so far) to continue here. What about a diffrent opponent who is less tricky and is drawing a lot smoother than the first opponent?