Kourtney Kardashian is ''serious'' with Younes Bendjima.

The 'Keeping Up Withe The Kardashians' star's boyfriend has grown really close with Kourtney's three children - Mason, eight, Penelope, five, and Reign, three, who she has with her ex-partner Scott Disick - and he ''loves spending time'' with them.

A source told People magazine: ''She is incredibly happy with Younes. They are getting serious. Younes is very close to her kids and loves spending time with them. The kids really like him. Kourtney is having the best time in Europe.''

Meanwhile, Kourtney previously praised her boyfriend for helping her find the balance between romance and family.

Speaking in the early stages of her romance with Younes, she said: ''I've definitely learned from my past relationship, where I really wouldn't travel without the kids. I think it is important to take time, especially because my relationship is important to me. Just because those worlds aren't colliding right now, just making sure that I make time for both. And I think going on a trip once in a while reminds me the importance of being present and in the moment when I'm home. I think it makes me the best mom I can be.''

From the outset, Younes has always cared for Kourtney.

A source shared: ''It's definitely serious. No one thought their relationship would last this long, but Kourtney is very happy. Younes has met her kids. Kourtney's family really likes him. He is the opposite of Scott. He doesn't party, isn't flashy and really treats Kourtney with a lot of respect. It's obvious that he really cares about Kourtney.''