Jenna Jameson -- I'm Doing Porn Again ... To Feed My Kids

Five short years after swearing she'd never do porn again, Jenna Jameson is back getting naked on camera for money -- and she tells TMZ, it's all for the sake of her family.

Jenna recently made her return to the adult industry as a webcam model -- stripping and doing sex acts online in exchange for tips -- and she says her kids are a HUGE motivating factor behind locking down a steady paycheck.

As we reported, Jenna's been having money issues. She recently lost her Hollywood Hills home to foreclosure.

But it's all especially shocking -- because back during the AVN Awards in 2008, Jenna swore up and down that she'd "never ever ever spread my legs again in this industry. Ever." It was awkward.