It was six months after he left her, no?

I don't know that it's about women having large hearts and not being cynical. Cynicism and a history of bad stuff can't stand up to love. Love makes people do some pretty stupid, pathetic things, including constantly proving that love to somebody who isn't paying attention or simply doesn't care. Look at all those ballads where the spurned lover dies of sorrow or does something intentional or obviously not good to prove their love.

Now, is welcoming the heart breaker back less believable than lying in bed until he/she dies? In real life, the abused let their abusers back into their lives and hearts all the time. Love, or maybe the desire to be loved, provides justification for people do some pretty destructive things.