Mauricio Umansky Kisses New Flame After Sushi Dinner in Aspen

Mauricio Umanskyis living up the single life in the middle of his white Christmas … locking lips with a beautiful blonde in Aspen after a sushi dinner.

The reality television star was spotted out in the celebrity vacation destination Tuesday night … walking out of Matsuhisa — a popular Japanese and sushi restaurant.

At his side was a blonde woman, bundled up against the cold … and, she clearly needed some body heat — ’cause she burrowed right into Kyle Richards‘ estranged husband’s chiseled frame.

Seems their lips were feelin’ frostbitten too … and, they just needed to tie them up in order to fend off the icy chill.

While Mauricio’s been seen gallivanting the globe with model Nikita Kahn, this is a new woman … an IG model named Klaudia K with whom he was seen at Kemo Sabe, a high-end Western wear store, earlier in the day.

As you know … Kyle and Mauricio split last year — though they haven’t officially started the divorce process yet. Kyle stopped by “Watch What Happens Live” last night — where she shocked Andy Cohen and the audience by claiming a conversation about divorce had yet to come up.

KR says she and MU are just living separate lives at this point … so, they haven’t sat down to talk about formally splitting just yet.

That said, Kyle’s taken a few shots at Mauricio recently … including on last night’s episode of “The Real Housewives of Beverly Hills” — where she agreed he was “probably” going through a midlife crisis.

Mauricio’s been spotted with other famous women in the past year and a half … including his “Dancing with the Stars” partner Emma Slater — though the two always denied dating.