'The Bachelor' Finalist Dishes on Behind-the-Scenes Drama

Reality-TV series contestant Catherine discusses her brother's distaste with 2013's "The Bachelor."
2:41 | 02/19/13

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Transcript for 'The Bachelor' Finalist Dishes on Behind-the-Scenes Drama
It is a big night for "bachelor" fans. The wait for tonight's special, "the bachelor" sean tells all, is almost over. Catherine went home with a rose last night. Now, she's dishing on all the behind-the-scenes drama to abc's abbie boudreau. Take a look. Reporter: He has the all-american good looks and charm. But if there's one thing ladies love about sean, it's this -- he is family-oriented. That's what I loved about him. Reporter: When the bachelor visits the hometowns of the last four ladies, sean is in for some unexpected family drama. From e's brutally honest sisters. I can't see her having kids right away. Reporter: To a surprise visit. I love you more than anything. Reporter: That may have been a prank. But this scene with desiree's brother, wasn't. I think you're just a playboy. Reporter: We caught up with catherine, the fun-loving 26-year-old, and one of the last three ladies standing. For behind-the-scenes dish, starting with her sisters. Can you see yourself with him and a family? I didn't know what to expect from them because they're really protective. I felt like I was defending my relationship. Reporter: Something desiree also found herself doing when her brother went on the attack. I think he's just a playboy. You're having fun with the circumstances. You know? Reporter: And cost her the When you're up against a lot of stress, I can understand where her brother was coming from. But sometimes people take it too far. Reporter: But the biggest "bachelor" bombshell of the season may be this. "Us weekly" reporting the 29-year-old is a born-again virgin. When I saw that, I felt for him. I don't know the situation. I can't imagine what he's going through. Reporter: So, what about those fantasy suites? Take a look at a "gma" exclusive sneak peek to next week's thailand getaway. I thought a lot about the fantasy suite. I would expect it to be very intimate. And it's scary. I'm so excited to give the fantasy suite card to catherine. I'm ready to spend time alone with her. Sean and catherine, should you choose to forgo your individual rooms, please use this key to stay as a couple in the fantasy suite. Reporter: But is there love in the thai air? I would not be surprised if i fell in ve in thailand, with sean. Reporter: For "good morning america," abbie boudreau, abc news, los angeles. All right, everybody. Be sure to tune in to "the bachelor." Sean tells all at 9:00, 8:00 central. on monday, 8:00, 7:00 central.

This transcript has been automatically generated and may not be 100% accurate.

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