Denise Richards: Charlie Sheen Has Cut Me Off ... And Called Me and My Kids Horrible Names

Denise Richards claims Charlie Sheen ... has betrayed his own children by turning his back on a trust he created for them .. a trust that promised them a home that he has now taken away ... and Denise also chronicles some shocking text messages she says he sent to their daughters.

Before giving details, we should say Charlie believes this is "a desperate attempt to get more money" ... his lawyer adding Charlie has already paid her almost $20 million, including $660k tax free money every year for the last 9 years.

Denise has filed massive legal docs claiming Charlie promised that if she moved next to him in a house he had purchased in Mulholland Estates, she and the kids would not be evicted. As we reported, she was also getting $55k a month in child support.

Denise says she was reluctant to move, because of Charlie's history and also because he had apparently informed her of his HIV status, telling her he feared he was terminally ill and "wanted to repair his relationship with his children."

7:55 AM PST -- Patty Glaser, Denise's attorney tells us "Not only are Mr. Singer's (Sheen's attorney) about Ms. Richards blatantly inaccurate, they're also inappropriate, and unprofessional. Ms. Richards is doing everything she can to protect her children from the fallout of Mr. Sheen’s erratic lifestyle and its enormously negative impact on their children."

Denise claims Charlie has gone off the rails in the last few years, getting hostile and aggressive. She says just before Christmas 2013 Charlie told their kids, "I'm giving all your gifts including the air hockey table to the homeless." She says he then began threatening to evict them.

She also claims she overheard a conversation with 10-year-old Lola in which he called her "a f***ing pig whore" and yelled, "I'm going to kill you and I'm going to kill your mom."

Denise says in Sept. Charlie violated their deal by forcing her and the kids out of the home and not getting them a new place, as he promised. Denise says she and the kids had to get a rental place for $15k a month. She's now spent more than $105k on the rental, which includes the security deposit.

Denise wants the judge to force Charlie to pay $1.2 million toward the purchase of a home ... money she says he agreed to pay under the trust agreement for the kids.

But what's really shocking about the legal docs are the texts she says Charlie sent in late 2013, including one to Lola, in which he allegedly writes, "Have a merry Xmas with your loser f***s**t mom ... your dad is a rock star genius ... your mom is a puss wart."

There are gut-wrenching letters one of the kids sent Charlie, including one which said, "And why would you say that you want my mother to eat pork and die?"

We're told Charlie believed Denise was writing the text messages from their daughters' phones, so his nasty responses were intended for Denise and not the girls.

And he attacks Denise's acting, saying, "Bitch couldn't act hot in a fire or wet in a pool."

Charlie's lawyer says, "In addition to what Charlie has been paying Denise, he also pays for school, all expenses and it's still not enough for her. He intends to fight this and believes he will prevail."

Denise's rep tells TMZ, "Denise is fighting for her children. This has nothing to do with her, the money is for her kids. This is about him providing for the children as he agreed to do."