Blake Lively embarassed after nephew caught her naked

The 'Gossip Girl' star was getting ready for her appearance on 'The Late Show With David Letterman' last week when the four-year-old she was babysitting burst in on her.

Blake Lively. Pic/AFP

"I didn't know if I was, like, embarrassed or, like, flattered... He couldn't get it together. And then later he came back again and he wanted me to throw him on the bed... and he's pulling open the door and I said, 'I can't, I'm naked again,' and he goes, 'Can I see, can I see?' He's four.

That's not OK. "I felt good about myself but when a four year old is laughing at you, you think, 'Oh, am I like the flabby aunt that's kissing him all the time?' He says he doesn't wanna hang out with me or his momma, because he says I try to kiss him too much," she said.