I don't see what the problem is. Unless your mother is one of those "Not under my roof" sort of people, you're an adult, she's an adult, then it should be understood that if you have a girlfriend sex is going to happen, as should if your mum has a bloke sex will happen.
He doesn't have the hook anymore. We found it hanging from my car's door handle yesterday morning. Now my girlfriend refuses to have sex in the car anymore. Bastard escaped killer never stops spreading misery!