Brad Pitt maybe one of Hollywood’s sexiest actors, a film producer, humanitarian and architecture buff, but at home he’s just a simple dad. And it’s this dedication to his kids that is causing friction with his partner Angelina Jolie.

“He wants to be the best father possible,” a source tells BettyConfidential. “He’s all about the kids. And at the end of the day he’s tired and all he wants to do is sit and relax. Angelina, on the other hand, is ready to roll!”

Brad and Angelina used to be seen out on the town regularly, but over the past month or two their date nights have been few and far between, which has prompted rumors that they were on the verge of splitting.

In what some cynics have seen as a shrewd PR move, the pair attended the Director’s Guild Awards last weekend, to put the rumors to rest.

Read 7 Signs That Brad Pitt and Angelina Jolie Are Splitting

But the insider says that the showy date night was just a band-aid; there are bigger problems that the couple needs to work on. “Brad and Angie’s relationship seems to have lost its spark,” the source says. “They’re bored with each other and their chemistry has fizzled.”

Part of the problem is that Angelina, 34, doesn’t want to be a homebody and stay in with the kids every night, while Brad, 46, loves to hang out with his kids and then relax at home after they go to bed.