Kyle Richards Had Dinner with Mauricio Umansky & Family in Aspen

Kyle Richards and Mauricio Umansky are playing nice and eating nice — especially in the presence of their kids … which is exactly how they ended their day in Aspen.

The estranged couple broke bread together with their daughters Saturday out there in Colorado, where the family of 6 sat down at a table inside Matsuhisa and chowed down on sushi after a day of skiing up and down the snowy mountains.

In photos obtained by TMZ, you can see mom and dad were actually right next to each other during the meal — and eyewitnesses tell us they looked cordial too … no apparent animosity.

In fact, we’re told they even spoke to one another a few times throughout their time there … this while the kids were distracted on their phones. So, on its face — a chill evening.

Pretty interesting, especially when you account for Mauricio’s wild time 2 days before Kyle’s arrival … when he was partying shirtless and hanging with bona fide hotties on the slopes.

Truth be told, it’s hard to gauge where things stand between him and KR … but they certainly don’t seem to be romantically involved. Perhaps they’re just coparenting through the separation and trying to maintain normalcy in household as best they can.