This is an excellent plan, but may I add fucking her mother. Get pics of your cock in her pussy and ass. When the girl finally cuts off the cash and won't have anything to do with you, you can show her the pics and laugh in her face.
Her mother would have surely been holding secret conferences with her for months via skype discussing why she should dump you.
But you have her so intertwined mentally and physically, assuming you thoroughly thrash her G-spot multiple times per day until her body is physically addicted to your semen not unlike pure afghani heroin, that she takes her mother's advices as a threat, suspiciously she assumes her mother wants the D...
The pictures of you dominating her mother's gaping wholes will cement these jealous suspicions she has had all along. "She wanted me to dump him so she could have the king cobra for herself!" she will declare.
You simply explain to her that her succubus of a prostitute of a mother seduced you with ecstasy and boone's farm strawberry...Obviously hypnotized by the cheap wine..there was nothing you could do but gape her ferociously.
She takes your side, and you slam her until she cries and can't stop mumbling "thank you, thank you, thank you"
So you've effectively replaced her family, and support system with yourself. Now she is completely under your control and would probably assassinate Obama if you asked her to. Now the real fun begins. You start having her rob banks for you while you chill on your new yacht.
All under the guise of it now being a serious relationship. That is all she wanted after all...