Your girlfriend has sleep issues, so you decide to lull her to sleep with some sensual persuasion

You run into your ex at the bar and flirting ensues... and the inevitable trip back to someone's apartment.

You're my ex and still have keys to my place. I just came home to find you in my bed unannounced. I'm pissed, but it turns out you're having a hard time and need me to make you feel better.

After a long work day, you come home to your needy baby, hungry for you.