[jackdaniels]

Tough situation bro.

The best I can offer is for you to be honest with your mom and tell her that if she wants to stay at your place, it will have to be under your rules (i.e. you can smoke, drink, play p*ker, whatever). It is unreasonable for her to expect you to accomodate her for an extended period of time without making any sacrifices herself.

One thing though, make sure you are clear that this is coming from you and not your girlfriend, as this can easily turn her against the girlfriend and make you r life miserable even after she leaves.

Ofcourse, if you are simply looking for agentle way to ask her to leave, you may need to get help from a sibling or other relative who can intercede and tell her that it is distressing to you to have her there for such a long time. Hopefully, she will get the hint that this came from you and leave.

GL.