Adding to her fears, the Biebs has already declared he wants to be a “young dad!”
“Nicole is freaking out! She’s worried Sofia will wind up pregnant and alone,” dished a source.
Sofia, 18, is the biological daughter of Nicole’s adoptive dad, singer Lionel Richie.
She hooked up with Justin, 22, in August and she’s already had a pregnancy scare, said an insider.
“Sofia cried she’d taken a home pregnancy test that came back positive,” dished the insider.
“She took two more, and both were negative. It was a close call!”
Justin is still known as a notorious skirt-chaser — and just days before scoring with Sofia, he was seen skinny-dipping with another girl.
“Nicole’s worried Sofia’s on a collision course with disaster,” added the spy.