I've always thought Drew would be sort of crappy about it. Like he'd totally refuse and get all angry, and then he'd suddenly make a point of spending lots of time with Ralph - or calling all the time if he's not in town - for a few months, just to "prove" that he's Ralph's father.

I can also see Ralph catching on to this very quickly and telling Drew something along the lines of he can't force Ralph to accept him as a father.