I guess you are waiting for her to either break up with you or tell you that she's shagging some other dude. From ur narrative, She has no manners, even the most minute of it. Instead of focusing on how to build on what you have presently which is your job and the only reason the gold digger is back, you are looking for who would teach you some advanced begging skills to use on a wayward liability.

Do the needful.....dump her ass like a sack of Potatoes and don't look back.

All these ladies on this thread saying you should dump her she is not worth it, they are not any better than your gf. Nigeria ladies are all the same they run their mouths like tap water. Don't give yourself headache over any Nigerian lady just play along,dont wear your heart on your sleeves for them.