Well, she had twins recently. I think it just looks like she's been working out too much in order to lose her baby weight, the muscles are all distended. Her cheeks are hollow and she's all sinewy.
Don't worry echewta, they'll go back to normal. Probably.
She just needs a little bit of fat on her to fill in the spaces between lumps, and a to wear a one piece. Because...eesh, yeah, you're skinny, I get it...but it ain't pretty.