Rabbit Man & Rat Woman
She will be in jeopardy because he likes to socialize and spend time with friends, ignoring his family and his wife. It is not likely that they can prosper.
Rat Man & Rabbit Woman
It is not likely that they can be happy together. She will hurt him often. And he will not be nice to her either. There will be adversity. Nothing can be accomplished.
(Source: Love & Luck in the Year of the Dog)