If she's of legal age? You certainly have the right to try and convince her not to sleep with me. However, if she chooses to sleep with me, you really have no right to prevent us from engaging in the act. In fact, if you threatened me or used violence to stop me, you'd be the one committing an immoral, criminal act.
Does she?
Certainly. She has the right to say no or say yes. If she says no and I force myself onto her, she has the right to defend herself, you have the right to defend her etc. If she says yes, nobody has the right to stop her through force, threats etc.
Do you have a right to violate my daughter - no. Do I have a right to stop you from doing it - yes.
I certainly don't have a right to violate her as my exercising of such "right" would violate her rights to do as she sees fit with her body. Similarly, if she consented to being "violated" as you put it, you would have no right to stop her.
Immoral is sleeping with her without being married to her. See, this is the difference between morality verses criminality. There are more people out there concerned with what they can legally get by with than with what they should be doing in the first place and it's because of permissiveness. Morally, I have a right to stand between you and my daughter. Therefore we have to look at the basis for saying that things between consenting adults are legal. Responsibility has to play a role. If you swindle her, then the consent is based on false trust. If you impregnate her, there should be legal recoarse because in absence of it, we have free spirits running around creating kids that the rest of the world must foot the bill for. Ouch. Steppin on toes, huh. Your presumed rights end where mine begin. I'm not paying for your kids.