Get a room! Jennifer Lopez and Ben Affleck pack on the PDA with passionate KISS during family dinner

The two A-listers were also joined by the Waiting For Tonight hitmaker's 13-year-old twin children son Maximilian and daughter Emme.

Despite being surrounded by family, the pair were not shy to pack on the PDA  as they enjoyed a steamy make-out session during the meal.

JLo placed her hand on his shoulder as she went in for a kiss and Ben was obviously smitten as he had a smile on his face during the smackdown.

The two didn't stop there as at one point the Selena star sweetly placed her hand on his cheek as they stared adoringly at one another.

In another snap, Affleck could be seen nuzzling her neck while seemingly whispering sweet nothings.

Of the PDA-packed outing, a Nobu source told People on Monday: 'Jen and Ben sat next to each other and were very affectionate. They held hands under the table.' 

It wasn't just kissing and cuddling for the stars, as the two did spend some time bonding with her family.

At one point, JLo's twins came over to show the pair something on a smartphone. 

The source for People added: 'Ben and her kids seemed comfortable together. The kids kept chatting with Ben. Ben seemed great. He was smiling and laughing. They ordered a lot of food to share. Ben had a Diet Coke.'

Outside of the restaurant, Ben seemed to have a blast with Jennifer's kids as he was seen sharing a laugh with her daughter Emme before making their entrance.

He was also seen arm-in-arm with the Hustlers actress and even placed a loving hand on her back at one point.

After the family gathering, Ben walked alongside JLo's son Max and even seemed to be pointing him in the right direction as the youngster looked exhausted.

The Argo star was also seen giving Jennifer's younger sister and birthday celebrant, Lynda, a hug before they hopped in a car together. 

Affleck has been spending plenty of time with Lopez's family as last week he was spotted filming a project with her mom, Guadalupe Rodríguez, at the Wynn Las Vegas.

It seems as if he A-list actor already has the stamp of approval as a source told People on Saturday: 'In the past, Jennifer's mom and Ben were very close. Guadalupe loved Ben. She was sad when they couldn't work things out years ago. 

'She is thrilled that they are back together now.'