We wonder how her little boy feels about his mommy being back on the dating scene?!

Kourtney Kardashian was out and about running errands with son Mason yesterday in LA, and the reality star was uncharacteristically camera shy as the duo made their way to the car. She seemed to be trying to hide her neck behind her handbag, and we have to wonder if she has a hickey from her recent romantic evening with boy toy Younes Bendjima?

The new couple celebrated the male model's 24th birthday at Il Cielo in Beverly Hills the other night, and it sounds like things are heating up!

"Kourtney and Younes have seen each other several times in the last week. It's been casual, but they are really getting to know each other and having fun. Kourtney really likes him and will text him to meet up whenever she has time without her kids," a source dished to E! News .

Her hot hookup isn't sitting well with Scott Disick, either!

"Scott doesn't like Kourtney dating Younes at all. He doesn't want to see photos of them or know about it. Kourtney has tried to give Scott a heads up that he might be seeing photos, but Scott can't stand seeing her with someone else, especially Younes. Whether they are together or not, Scott gets really jealous when he sees or hears about Kourtney with anyone. He'll always love her, regardless of their status," the source added.

Does anyone else find it creepy that she's almost 40 and going after someone basically half her age?