Okay, subtlety was never my main attribute:
http://www.discoverychannel.ca/shows/showdetails.aspx?sid=29
Benefits:
1. National recognition
2. She may not win, that would make her feel good
3. She may win, that would make you feel good
4. Going without sex for the next few years will leave you more free time.
Downside:
Can't think of any.
Seriously, play up the pregnancy unborn child safety angle.