Back off, Blac Chyna! The 29-year-old and her ex Rob Kardashian currently split custody of their one-year-old daughter, Dream Kardashian, equally — but Kris Jenner thinks that should change. “She’s determined to have Rob get full custody of Dream,” an insider tells Life & Style. Watch the video above to see why Kris thinks Dream isn’t safe in the hands of Chyna!

The source continued, “She wants her lawyers to use footage from the incident as proof that Chyna is an unfit mom.” The “incident” in question is Chyna’s recent outburst at Six Flags on Easter Sunday where she reportedly used Dream’s toy stroller as a weapon to attack another person who allegedly tried to touch Dream’s head.

Even though Chyna was reportedly acting out to protect Dream and her five-year-old son, King — whom she shares with ex-boyfriend Tyga — Kris “believes her granddaughter would be better raised under her watch.” And while the momager doesn’t want to take Dream away from Chyna, she feels that the former stripper “put Dream in harm’s way.”

Kris wasn’t the only member of the Kardashian/Jenner crew who was upset over the footage, either. “Rob got very angry when he heard what happened at Six Flags,” a source told People. “He’s definitely worried about Dream when he’s not with her. He knows who Chyna is and he doesn’t like her behavior around Dream.” Despite his concerns, Rob was reportedly “happy” that the attack was caught on camera as it could possibly be used against Chyna.

Ever since Rob and Chyna split for good in February 2017, it’s been a rocky road in terms of their custody battle. They finally reached an agreement in September of that same year as Rob was ordered to pay Chyna $20,000 a month in child support in exchange for Chyna dropping the domestic violence allegations she had against him. (Chyna got a restraining order against Rob after he allegedly beat her up and threatened to kill himself.)

Not only did Rob agree to pay Chyna more than he wanted, but he also paid her legal fees throughout the whole process, according to TMZ. There’s no word yet on whether the stroller incident will lead to a custody change, but if it’s up to Kris, it’s possible.