Your girlfriend is a succubus!! This is great most of the time. She's extremely physically affectionate with you and clearly loves you, But in order for her to maintain a form in the human world, she has to consume male sexual essence (semen) very often. There's no way you alone could provide her with enough susten...
There is a way to make her 100% loyal but you have to be firm but kind with what you tell her. You can come up with a way she will be able to only sleep with you.
This is a really fun character to play around with :3 Very loving, and also very slutty and outgoing.