Britney Spears has given up fighting for her kids, according to the troubled pop star's first husband Jason Alexander. The Louisiana local, who was married to Spears for just 55 hours, has spoken out about his former wife's custody battle with second ex-husband Kevin Federline. He tells America's In Touch Weekly magazine that Spears accepts she's no model mum and she doesn't want her sons Sean Preston and Jayden James back. Alexander says, "She wants to see them (kids), but she doesn't want to be a full-time mom. She said it doesn't matter if she doesn't get them back full-time, and that she can always have other kids later on." Spears lost the right to visit her sons last month (Jan08) after a stand-off with police and paramedics at the end of a visitation term. Before that she was stripped of physical custody after failing to adhere to court-ordered testing. Alexander reveals he and his ex have been speaking since Christmas (07): "I got a phone call, a voice mail, that said, 'Hey! It's me. I know we haven't spoken in a while.' It was Britney. She said she'd call me back, and we've been speaking ever since." The ex-husband insists Spears "misses" her kids, but adds, "I don't think she should have full custody because she needs to focus on her."