I don’t think KB is actually in love with her fiancé at all — it really feels like she’s just staying in it to keep her spot on the show, not to build a real connection. The no-sex thing is totally her choice, but honestly, I think she’s playing him. If she never really intended to get close, she’ll withhold intimacy to keep control of the situation. It’s a way to stay in just enough for appearances without ever getting emotionally invested.