If it was my wife, I'd like to know it before I married her. Suddenly finding out someone is a pornstar seems like a failed relationship to begin with if you've built it on a lie. But I guess I wouldn't have any problem marrying a pornstar, within certain boundaries. No, I would not want to marry someone who is doing 300 guy bukkakes and gaping anal scenes. Nor would I want to marry someone who has done surgery on their tits ten times into double G's. Call me shallow, but that's how I feel. I can't swear on this though. You can fall in love with the most surprising people at times.
As for a daughter.
I would probably not want her to do it. But I would accept it, and simply face the fact that's it's not my choice. In which case I would much rather be supportive and loving than judgmental.
There is however certain degrees like before. I'd hate to see any daughter of mine go through consecutive plastic surgery destroying their natural bodies. And I wouldn't want her to catch STDs, do drugs or get involved with disrespectful people either. But most of these things are self-evident, and being in the porn business doesn't necessarily mean exposing yourself to any of it. There is however a higher risk than if you work as a architect so to speak.
All in all, it would take much more than a choice of profession (provided it's not like hitman or something) for me to forsake my children. I agree with what's being said here. You can dislike all you want, but anyone who would abandon their daughter over something like this doesn't deserve to be a parent. You should love your child without any reservations, and always guide them in the right direction. In the end though, it's up to them if they are old enough.