What do you do when your niece's mamma has a run-in with the police while she's on vacation in Hawaii with her boo? You take the little tyke for a tour of the local fire station, that's what!

Khloe Kardashian planned a fun outing for daughter True and niece Dream, on Monday, and shared some sweet snaps to social media. The trio visited Los Angeles County Fire Dept. Station 125 in Calabasas. Baby True wore a pink tulle skirt and a unicorn headband, of course, while Dream looked adorable in a yellow overall dress with black shirt.

Khloe wrote on her Instagram story: "Yesterday we took the girls to our local fire station. We wanted to say ‘Thank you’ to our local [heroes] for all they do for us!"

So why was Khloe taking care of Dream ... because mommy Blac Chyna jetted off to Hawaii with her boyfriend Kid Buu during the time she had custody! Daddy Rob Kardashian couldn't reach his baby mamma and realized his daughter was staying with a nanny while Chyna was off on vacation.

"Chyna planned on having Dream stay with a nanny in L.A. while she was in Hawaii. Rob is mad because if either parent is out of town, the other parent is supposed to have the option to keep Dream longer," a source tells People magazine. "Rob doesn’t want Dream to stay alone with a nanny while Chyna parties in Hawaii. This is what he is mad about. She needs to tell him when she won’t be in L.A. so Rob can keep Dream longer. Rob is getting his lawyer involved,” said the insider. “This situation’s not in Dream’s best interest."

As always, savior Khloe stepped in to babysit Dream along with Rob. She's a saint!