I never married Travis to one of the women, because I feel that would only destroy the friendship those three have. A nonromantic male/female friendship is something so precious that I will not endanger it.
That said, I didn't really play that household in-depth, only dabbled a bit. One time in a Star Wars save Liberty had the hots for a young adult Sith apprentice, another time Summer fell in love with a sailor/fisherman and yet another time poor Travis had to marry poor Cassandra, because I was playing a challenge where you had to merge all premades into one uge family tree and those two were the only ones left over.