A wise man once told me, "If you're in a relationship, don't allow yourself to get into situations you may later regret."
This isn't jealousy or mistrust. It isn't some "limitation" on yourself. It is a simple recognition that:
1. Temptation is a tricky thing and no one is immune.
2. You may not know the other person as well as you think. There are much worse things that can happen when you are alone with someone.
To pretend otherwise is ridiculous. Kaiden is not being a paranoid ogre here. He is recognizing the fact that the "love of his life" is, for some reason, placing herself into a potentially tricky situation. It certainly doesn't mean anything will happen, but it's a possibility.
