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I’m sorry you’re experiencing this!

I want to start out by saying that him basically forcing you to have sex that time and making you have sex with his friends is considered rape and you do not deserve it. Consent isn’t just the absence of a no. It has to be the presence of a sober, enthusiastic yes. It sounds like he has manipulated you and has taken advantage of you. I know you may want to continue having sex with him but it doesn’t sound like he actually cares about your well being and is using you just for the sex. The situation doesn’t sound safe, especially if he is bringing other men around, and I’d seriously reconsider this arrangement. Do you have anyone you can talk to about this?

I’m proud of you for wanting to tell your mom. Maybe you can tell her in the form of a letter and say the same things you laid out here, that you’ve been having sex with one of her friends but he’s been bringing around other people and you want that to stop. She’ll probably have other questions for you but you’d have gotten out the initial things you wanted to say. Letters can be good because they allow you to get everything out without nerves or interruptions getting in the way.

If you tell her verbally I’d tell her in private on a day where she’s in an okay mood. You can make a list of points you want to talk to her about so you don’t forget anything.