Ben Affleckis inrehab for the third timebut Shauna Sexton denies having anything to do with his latestneed for treatment.

ThePlayboymodel, who had been spending time with the actor amid news that he andLindsay Shookus, 38, hadcalled it quits after one year of dating, hit back at a fan on Instagram who accused her of getting Affleck “thrown in rehab.”

“I love to drink and party! Absolutely dude. Most 22 year olds do,” she also wrote after the same fan said she was “arrested twice for underage drinking and public intoxication just last year.”

Barry King/Getty; Gabe Ginsberg/Getty

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Sexton did not deny her past with alcohol, saying she had made “a dumb mistake and an embarrassing one at that.” However, the model double downed on her denial that she sent Affleck to rehab.

“He is happy being able to date who he wants andnot feel tied down to a serious relationship,” a source told PEOPLE at the time.

Shauna Sexton/Instagram

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But days later, when Affleck’s exJennifer Garner— with whom he shareschildrenViolet, 12,Seraphina, 9, andSamuel, 6 — was seen driving him to rehab for alcohol addiction, Sexton was photographed on a Malibu beach in a bikini.

PEOPLE confirmed Affleck, 46,entered rehabfor alcohol addiction on Aug. 22. “He is seeking treatment. He knew he needed help and was vocal about it,” a source said.

Days leading to his return to rehab, an insider told PEOPLE: “Ben had been drinking alone for days. He was in bad shape. He had barely been eating and had not showered. It didn’t take much convincing. He wanted to go, and he cooperated.”

WATCH:PlayboyModel Shauna Sexton Relaxed in a Bikini Hours BeforeBen AffleckChecked Into Rehab

Several sources said Affleck had in fact been struggling again for months, though he had been going to meetings and working with a sober coach for much of the last year.

“He’s battled addiction for a long time now,” an Affleck source said, noting the star had been “constantly working on himself” but after splitting with Shookus in July “went into a darker and darker place until he had to reach out for help.”

If you or someone you know is in need of help, please contact theSAMHSA substance abuse helplineat 1-800-662-HELP.

source: people.com