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 year his junior.

 <span class="wp-caption-text">Instagram/Hana Sun Doerr</span>

Instagram/Hana Sun Doerr

“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,” says a longtime friend of the family. “It’s just part of her somewhat paranoid personality.”

Last month, the 44-year-old Honest Company mogul and Danny, 32, who starred in Captain America: Brave New World, sparked relationship rumors after they were spotted leaving Cancún together following a romantic getaway, seven months after she filed for divorce from Cash, 46, her husband of 16 years, according to E! News. The two share three children, Honor, 17, Haven, 14, and Hayes, 7.

 <span class="wp-caption-text">Getty Images</span>

Getty Images

Even though their split has been amicable, it had to sting that Cash is moving on, the insider says.

“She knows better than anybody that even women who have no idea who Cash is can’t resist him,” says the insider.

“Even in early middle age, he’s still an impressive physical specimen with an effortless, easygoing charm, and he’s a genuinely nice, upbeat guy on top of all of that,” the source says. “He’s doing just fine for himself and not stressing about Jessica pursuing her own new romance.”

 <span class="wp-caption-text">Instagram/jessicaalba</span>

Instagram/jessicaalba

According to our insider, it’s no surprise Jessica has opted for Danny, who’s also Mexican-American. “That part of her heritage has always been important to her, and it was something Cash was a bit in the dark about throughout their 20-plus years together.”

Besides her new romance, the Fantastic Four alum has a lot of other things on her plate right now, says the insider.

“Jessica’s leaning into acting work aggressively, and she’s still a full-time mom on top of that,” says the source. “The fun distraction of a new romance is just what Jessica needed to take her mind off the crazy last two years she’s had as her marriage went up in smoke!”