You can watch the amazingrace.wikia.com teams' pages in order to get that information. Usually, by the end of a team's page there are some Trivia, and it says if a team got married, split up, have children, etc.
I know for example these status:
From TAR 15:
Meghan & Chayne got married
Mika & Canaan broke up on sequesterville
Brent & Catie broke up
Jordan & Jeff had a son or daughther, I don't remember
Chad & Stephanie got married and had children
Ernie & Cindy got married and had children
Brenchel got married, and a daughter a few weeks ago
Vanessa & Ralph broke up just after the race
Rachel & Dave got divorced.