"The drug and alcohol issues with both of them are relevant in terms of what's in the best interests of the children," she said, "but the reason that she sought the (protective) order really appears to be the threats of violence."
In documents filed in Los Angeles Superior Court in March before the custody matter was temporarily solved, Mueller called Sheen insane, claimed that he threatened to stab her in the eye with a pen knife, and said "I will cut your head off, put it in a box and send it to your mom" if she tried to take back their sons.
Allred said that with both parents' history of alcohol and drug abuse and Sheen's past displays of violent behavior (he was arrested for allegedly brandishing a knife at Mueller in 2009 and was convicted of battery with serious injury in the Ashland case), there are no easy decisions.
During his interview with ABC News, Sheen said none of this mess will affect his kids' opinion of him in the slightest.
"They'll wake up one day and realize how cool Dad is," he told "20/20." "And, you know, signs all the checks on the front, not the back. And you know, we need him and we need his wisdom and his bitchin'-ness."
ABC News' Sabina Ghebremedhin contributed to this report.