Tell her you want to make a baby with her

You know that Valentine Demy is neither a wife-material. In fact, you are very much doubtful she can be a good mother. However, what your mind and heart tells you to stay away, your lust and body are sending signals that it wants to breed with the woman. “I want to breed you."

Valentine stares at you for a while before smiling coyly. "You are very brazen for someone young. Doesn't think things through, and at the risk of sounding rude to you, the young master, I have to say you think with your dick. You do know I'm very experienced in these things. Don't you think that this is all on purpose just to get you"

Basically, she's reproving you for being inexperienced and easy to influence. While the statement annoys you, she is right in the sense that your hormones are telling you to go and fuck her.