The sisters show off their curves

Kim Kardashian‘s legendary bum appears irresistible even to her family members.

Younger sister Khloé has shared a funny photo of her grabbing Kim’s famously curvy bottom for #ThrowbackThursday on Instagram.

The old snap shows Kim, 33, laughing as Khloé, 29, puts a hand on her derrière.

Eldest sibling Kourtney, 34, strikes a pose next to her cheeky sisters and the girls all wear fitted dresses that show off their shapely figures.

Throwback Thursday @kimkardashian @kourtneykardash,’ Khloé captioned the photo.

The reality star’s followers couldn’t help but notice that having a curvaceous bum seems to run in the family.

Ass family 😂✌,’ one fan wrote.

Lovely Sistaz,’ another admirer commented.

Kim’s large behind hit the headlines again last month when she showed it off in a very revealing swimsuit selfie.

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Anna Francis