Blah blah

Just found out my SO went out and smoked weed while I was in labor, I was asleep, but not the point. And then like 10 mins after he got back I had the baby. We made a deal I would not eat in our new car and he would not smoke in it. Well he smoked in it while I was in labor. Just seems selfish. Idk if I should just let it go of tell him, if I tell him it won't matter cause it already happened. Just lost at what to do.