(((((HUGS)))))) You did the right thing, it is just hard because it is your son. But now he knows your stronger and mean business. And you know he is going in with his Dad so he still isn't on the street. Use this time to get a grip and KNOW you did right.
Maybe he will see clearer at his Dads. Prayers and hugs for you this isn't easy, but your not alone. Now have some choclate, lots of choclate or whatever your favorite comfort food is. It will be ok!