A source tells Us Weekly that Willow and Jaden Smith sleep with their pet snakes. Credit: Steve Granitz/WireImage.com

Sssssssleeps with snakes! It's slithering over at the Smith household, where Willow Smith and her brother Jaden allow their pet snakes into their bedrooms. "Willow is obsessed with snakes," a source tells Us Weekly, adding that Jaden, 15, "cuddles" with them in bed.

"She has 10 sleeping in her room," the source adds of the 13-year-old, "and some aren't in cages!" She isn't the only Smith family member who adores the serpents. Her brother Jaden refers to his sister's pets as his "girlfriends," the insider tells Us. "They slither into his bed and curl up with him!"

"Whip My Hair" singer Willow welcomed her first boa constrictor, Beauty, back in 2008 when she was 7 years old.

Their mom Jada Pinkett Smith explained in an interview last July what finally made her cave and allow the reptiles into the home. "I've always loved snakes but was afraid of them," she told Redbook magazine. "But Willow had wanted this one snake forever. She'd go into the pet store and pick it up and wrap it around her. I'd never touched a snake before, and I put out my hand, and Beauty [mimics the snake slithering up her arm]. I've been in love with her ever since. I said to Willow, 'You did Mommy a big favor. You helped me overcome a fear.'"

Dad Will Smith doesn't mind the creatures, either. In fact, having snakes in the house is a relief for the Independence Day actor, who told Ellen DeGeneneres last May that he is terrified of mice. "I'm good with snakes," he said. "Willow has a boa constrictor… but mice? Whew!"