from www.radaronline.com – Charlie Sheen has been cheating on wife Brooke Mueller with Angelina Tracy, a paid escort.

As RadarOnline.com was first to report, Charlie’s marriage to Brooke is a disaster and he wants out.

Now he’s been photographed wearing a fake moustache disguise as he goes out in public to meet Angelina.

RadarOnline.com learned that Brooke had no idea Charlie was cheating again.

Charlie is in rehab for alcohol and crack, although his “official” reason for going back in was for preventative measures.

And Brooke, who has been in rehab more than five times, is also being treated for alcoholism and crack.

Meanwhile, RadarOnline.com has learned that Charlie and Brooke have introduced other sexual partners into their marriage almost from the beginning.

“But it was always done together,” one source told RadarOnline.com.

Charlie’s hook ups with Angelina are without Brooke’s knowledge.

With Charlie’s affair now public things will take a dangerous turn for him in the criminal trial where he faces domestic violence charges in Aspen. Charlie and Team Sheen were hoping that Brooke would not cooperate with prosecutors, making it tougher for them to gain a conviction.

“Once Brooke sees this proof that Charlie is cheating she’s probably not going to be inclined to help him,’ the source said. “She’s going to flip out.”

It was Brooke who was talking about divorcing Charlie previously and this is sure to reignite that talk, the source says.

While Brooke’s lawyer previously dismissed reports of problems in the marriage, Charlie has now been caught and the source does not think he can talk his way out of this one.

“He’s been cheating for a long time,” the source said. “He just got caught.”

A rep for Sheen had the following to say about the allegations: “The woman in question is the sister of one of Sheen’s campmates and Sheen was only responding to a 12th step call. Since Sheen knew he was being followed and how this would look, he wore the moustache in a tongue and cheek disguise gesture.”

Update: Charlie Sheen says she was a woman in need of counseling. Other people say she was his sexual partner.

No one disputes that she’s a paid escort.

As a new cheating scandal erupts around Sheen, RadarOnline.com has learned exclusively that not only did Sheen take Angelina Tracy back to his house, when his wife wasn’t there, but he also took her to a neighbor’s house to hide her from his wife at other times.

Charlie is a close friend to one of his neighbor’s and that neighbor has a guest house. When Brooke was around, on at least one occasion, Charlie took Angelina to the friend’s guest house to spend time with her there.

Charlie’s rep released this statement about the cheating charges with Angelina: “The woman in question is the sister of one of Sheen’s campmates and Sheen was only responding to a 12th step call. Since Sheen knew he was being followed and how this would look, he wore the moustache in a tongue and cheek disguise gesture.”

But RadarOnline.com has learned that Charlie was followed many times and didn’t know it. On at least one of those occasions he took Angelina to the guest house of a friend’s house, just down the street from his own home. Wife Brooke Mueller was home when Charlie did that.

“She had no idea he was right down the street with an escort,” one source told RadarOnline.com. “He wasn’t acting like a man ‘counseling’ someone.”

In fact, the source says, Charlie had been seeing Angelina for weeks.

Charlie had access to his friend’s guest house so it was a good place for him to take Angelina, the source said.

And in terms of Charlie’s explanation, the source laughed. “You don’t sneak all around town to counsel someone!”