Ashlee Simpson, who’s reportedly set to make her Broadway debut as Chicago’s Roxy this December following the wrap of her role on Melrose Place, is defending her big sis in the December issue of Women’s Health.

“My sister has an incredible body. I feel sorry for anyone who would judge her, because she’s one sexy lady,” the actress, 25, says of Jessica Simpson, who’s made headlines for her weight fluctuation. “It’s disgusting that people would say those things.”

Jessica Simpson, 29, meanwhile, already returned the favor earlier this month, when she bashed the writers on her sister’s former show. “CW catching up on MP. Who writes this crap? i have had bad scripts to work with, but this? thank God my sister is amazing and got you some press,” she Tweeted.