Charlie Sheen has been paying his ex wife and mother to his twin sons, Brooke Mueller, child support since their split.

He's over that now -- because he doesn't think his child support payments are actually supporting his kids. He may be onto something.

TMZ reports that Sheen believes Mueller is using his $55,000 monthly checks to fund not their sons, but instead her own seemingly endless trips to rehab.

Sheen's paid for her previous failed stints at recovery, and he doesn't feel like doing that anymore. What's more, Mueller doesn't even have the kids -- Sheen's other ex wife, Denise Richards, has been taking care of both her two daughters with Sheen as well as Sheen and Mueller's sons.

Sheen has offered to up Richards' child support payments while she cares for his sons along with their daughters, but Richards has continuously refused any extra cash. Richards also took the tots to visit Sheen on the set of 'Anger Management,' something that Mueller previously flipped out over.

Meanwhile, Radar Online reports that Mueller will have to "jump through hoops" post-rehab to even have a chance at getting her kids back. She'll be subjected to random drug testing and Richards will likely maintain her guardianship of the boys for at least another six months.

Say what you want about the other aspects of Sheen's life, but in terms of parenting, this dude is still, well, winning.

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