My mom is extremely promiscuous, what should I do?

as much as you wont like this answer i'll stand behind it the best and really only good option is try your best to ignore it working is good you have 4 more years till you can go out on your own work as much as you can and save money trust me an 18 year old can make it on there own if they try hard enough the worst thing you could really do is try to blackmail her or control her because it would only make the situation worse and she is still in control of you and you never wanna piss someone off that is in charge of your well being