Ben Affleck & Young Playboy Model Shauna Sexton Split Days After Romantic Getaway

That was fast!

Just weeks after they began hooking up — and days after their romantic getaway to Montana — Ben Affleck and his Playboy model girlfriend Shauna Sexton have split, RadarOnline.com can confirm.

The recovering alcoholic actor, 46, and his 22-year-old girlfriend were first spotted together in August, after his breakup from Saturday Night Live producer Lindsay Shookus, 38.

Sexton remained by his side as he returned to rehab that month, often visiting him at his Malibu facility.

Upon his release from inpatient treatment, he whisked her away just this past weekend to the country property he shares with ex-wife Jennifer Garner, 46.

A source previously told RadarOnline.com his family, friends and counselors were concerned about Affleck's hot fling with the hard-partying young model.

"No one in his life thinks that he should be getting involved with Shauna," a source said last month.

Looks like perhaps he finally listened to advice. A source told People, who first broke news of the split, that he is now going to "focus on his sobriety."