Blac Chyna strips for cast of her baby bump and then twerks in pool

Pregnant Blac Chyna left little to the imagination as she stripped off on Sunday's episode of Rob & Chyna to get a cast of her boobs and baby bump.

The 28-year-old video vixen also showed off her famed curves as she twerked in a thong bikini in her mansion's swimming pool, as her two naked pals slapped her butt playfully.

The latest episode of the E! show kicked off with Rob Kardashian, 29, telling the cameras that things between them had greatly improved.

Body cast: Pregnant Blac Chyna got an upper torso cast on Sunday's episode of Rob & Chyna

'Things have been going great for Chyna and finally I am getting to a place where I am ready to move back in with her,' he told the cameras.

The pair then opened up a string of baby gifts for their daughter before she told him she wanted him to move back in.

'Rob has been working on himself, the baby is on its way and it is exciting to know that we are gonna be getting everything together before the baby comes,' she said.

Rob told her that he was trying to 'get healthy' and he now understood it was a lifestyle he had to lead for the rest of his life.

Twerking it: The 28-year-old reality star twerked while in the pool with friends

Going great: Rob Kardashian at the start of the show said things were going great with him and Chyna

Chyna was helped by her twin blonde friends as she got an upper torso cast.

They also jumped naked in the pool and watched as Chyna twerked.

Chyna and her gal pals also took turns touching their posteriors.

Helping hands: Chyna's twin blonde friends helped her with the casting

For posterity: The cast showed about six months into her pregnancy

Pool fun: Chyna's pals stripped down for fun in the pool

Kardashian family friend Jonathan Cheban met Rob for the first time in four years before they and Kris Jenner met with Rob's nutritionist.

The doctor then did blood tests so he could tell Rob what was going on with his body and sugar levels and found that his health had improved significantly.

'Rob has been taking care of himself a little bit better, watching what he eats, doing some exercise and the numbers have come back down to where it is like any other normal person, this is great news,' said Kris.