Happy V-Day. How about a talent about love?
Romantic Partner-talent-two characters are required to have this talent if any character takes this talent-while a character with this talent is attacking an enemy threatening another character with this talent, the attacking character gains a +1attack bonus and the DC of all spells and abilities increases by +1. If one character with this trait dies then all others in this talent group gain a -1 penalty to attacks until they gain one level.
Thoughts?
Throat Punch Games 
I kind of like this. It would bring in some interesting party dynamics. What about polyamorous relationships? Slippery slope, and all…lol