Sandra Bullock is in the middle of an increasingly nasty custody battle with former adult film star Janine Lindemulder, the ex-wife of her husband Jesse James. Bullock is seeking full custody of James and Janine's 5-year-old daughter, Sunny.

Bullock and James have been raising Sunny together since January when Lindemulder was sent to prison for tax evasion. Lindemulder is now claiming that Bullock wants her daughter because she can't have children of her own.

Bullock, 45, in a letter to the judge at Lindemulder's sentencing, claimed that Sunny was often left alone in her mother's care as her mother was "asleep from drug use."

Bullock continued by stating:

“I am aware that Janine has claimed many times that my desire to have [the girl], was because I could not have children of my own but that couldn't be farther from the truth. I myself have stopped working like I used to in order to be here with Jesse and the kids because we are on constant high alert never knowing what condition Janine will be in, and even more concerning, the condition [the girl] will be in.”

Sandra also discounted her claims that she was unable to have children:

"We realized that due to the instability in [the girl's] life, bringing another child into the world at this time would not be in [the girl's] best interest."

Lindemulder has taken their battle to the public in an interview with Good Morning America, admiting that she has made "horrific choices in the past" and adding that she is ready to start a new life with Sunny and her husband, Jeremy Aikman.

Lindemulder continued, stating:

“It hurts tremendously, the accusations, especially from Sandra. Even more so because we've never sat down and talked. You know, that's the one thing that I wish more than anything, for a remedy for what's happening here, is just communication. What would give her the right to take away my daughter? You know, this is my daughter. I am the best mother I can be.”

Her husband, Jeremy Aikman has been in federal prison on gun and drug charges, and isn't the best role model either.