I remember them being longtime friend, possibly childhood friends. They have casual sex. One of them has an older sister who wasn't around but she visited when they were having sex. She didn't say anything, she just left her baby there with a note saying if they didn't care for it she'd tattle about what she saw.
They took care of the baby and slowly got closer until it was a real relationship. I remember a scene where they took the kid to school. I think at some point the "friend" had a short term move in to help but I could be wrong.
It's been a while so some details could be off.
I remember them being longtime friend, possibly childhood friends. They have casual sex. One of them has an older sister who wasn't around but she visited when they were having sex. She didn't say anything, she just left her baby there with a note saying if they didn't care for it she'd tattle about what she saw.
They took care of the baby and slowly got closer until it was a real relationship. I remember a scene where they took the kid to school. I think at some point the "friend" had a short term move in to help but I could be wrong.