Los Angles: Jennifer Carpenter has been labeled a home-wrecker — after she was accused of carrying on with a married man. The Dexter actress — who’s divorced from costar Michael C. Hall — has been quietly dating the married folk-rock singer Seth Avett. Seth, 32, of The Avett Brothers, has been married to his wife Susan since 2008 — and even though he’s still technically married, he’s been dating Jennifer, 33, since 2011. According to an insider close to the band, the two were engaged in a long-time secret affair that ultimately destroyed his marriage.–SS

“Shortly after Jennifer’s split with Michael, she began seeing Seth.

“She would fly all over to his concerts to be with him,” a source said.

“No one saw this affair coming from those closest to Seth, but he finally left his wife last winter to be with Jennifer.”

Seth formally made the announcement on his band’s website last Tuesday that he and his wife are FINALLY separated.