Kevin Federline was reportedly "shocked" that his ex Britney didn't fight harder for her kids. Apparently he wasn't aiming for sole custody, and he was just putting up a fight.

A source tells British magazine Closer, "Kevin loves his sons, but he didn't aim for sole custody. He wanted to be a co-parent and didn't expect Britney not to fight for custody.

"He never wanted full responsibility. He believes both parents should take an active role. It's tough being a single parent, plus he already has another two children."

So basically he was fighting for more money, but joint custody? Some things never change!