Ladies, is it true?

I read once that some of the ladies that have sex with other men is because they want to be dominated by another men; just plain sex. But at home with the husband or boyfriend they want to "make love". Is it wrong to have rough sex with the significant other? Get "fucked" by your partner? Do you feel comfortable with this? Is it achievable? Or is the "rough fuck" just "wall banging sex" only reserved for outside the relationship?
My wife likes to "make love" and then turn up the action as we go. However, she doesn't like rough from the start. But I wonder if it is because of our relationship. One of the reasons that I want my fantasy of seeing her with another man; would she react differently?