Newly single Jessica Alba is getting hot and heavy with hunky actor Danny Ramirez , but even so, she's feeling pangs of jealousy now that her ex Cash Warren is dating model Hana Sun Doerr, who's 20 years his junior, RadarOnline.com can reveal.

"Just because the marriage is over and Jessica is moving on doesn't mean the prospect of Cash dating isn't Jessica's worst nightmare, because she can be prone to jealousy," said a longtime friend of the family.

"It's just part of her somewhat paranoid personality." Article continues below advertisement

Still Feeling Jealous Tap Here To Add Radar Online as A Trusted Source Article continues below advertisement Article continues below advertisement

Last month, the 44-year-old Honest Company mogul and Ramirez, 32, who starred in C

See Full Page