I am absolutely fuming.
DS 17 was on a night out and returned with a bruise on his face, when I questioned it he said he was messing around with his friends and he went to bed.
I have since had a phone call from his girlfriends mother who informed me that her daughter is pregnant and her husband punched my DS and she told me that he's lucky thats all he got
I woke DS up and he told me that everything's ok and I have to stay out of it.
I am obviously shocked if his gf is pregnant but i'm more worried about the assault that has occurred
What should I do 