But their wedding night? That's when things will really heat up! In a new interview with People, the couple explain why they're waiting until marriage to get intimate.
"From my perspective, I've lived life kind of selfishly for a long time," says Sean, who is a conservative Christian and born-again virgin. "Now, I'm going to try to live it the way I know to be right."
And Catherine's reasoning? "I honor him," she says.
While the reality stars now can't wait to get to the altar, there was a time when Catherine wouldn't say "I do" to The Bachelor!
"I was skeptical about truly falling in love with somebody because it's such an unnatural experience," the 26-year-old bride-to-be told The Seattle Times. "[My best friend] signed me up against my will."
Catherine added that she "obviously shattered those [fears] pretty quickly and found the man of my dreams."
See? Sometimes happily ever after starts with reality TV!