The 28-year-old reality star showed off her slim post-baby figure in a striped bikini following her split from Dream's dad, Rob Kardashian.
"Sunday funday at Muva house," Blac Chyna captioned a photo on Instagram of herself and Rose posing by the pool.
"Dreammmmmmmmmm," she added to a picture of herself with her 4-month-old daughter.
Blac Chyna and Kardashian, 29, welcomed Dream in November after getting engaged in April. The couple reportedly called it quits again in February after a highly-publicized split in December.
"[It's the same] with her yelling and screaming about how his family doesn't like or support her, and his insecurities," a source told Us Weekly at the time.
People reported last week that Blac Chyna and Kardashian are gearing up for an "ugly" custody battle for Dream. Kardashian's family has reportedly rallied around him in the wake of his breakup with Blac Chyna.
"I expect things to get ugly," an insider said. "Chyna wants full custody with Rob only getting visitations."
Meanwhile, Blac Chyna and Kardashian's E! series, Rob & Chyna, has been put on hold, according to Us Weekly. The show completed a first season in December and was renewed for a second the same month.
"It was hard for them to film Season 1, and Season 2 is not happening," a source said. "They can't even get through a day together -- logistically they can't do it. They co-parent Dream, but they don't spent time together with Dream."