‘RHOSLC’ Mary Cosby
Son Robert’s Wife Files For Divorce

Published November 25, 2025 5:14 PM PST

Thanksgiving arrives with a side of family drama for “Real Housewives of Salt Lake City” star Mary Cosby … because her son is going through a divorce.

Robert Cosby Jr.‘s wife, Alexiana Smokoff, beelined it to a Utah court Monday and filed to divorce the reality star’s son … according to new legal documents obtained by TMZ.

The docs — which were filed in Utah — are under seal … so, at least for now, there’s no way of knowing the reason for the split … ditto for any details on what she’s looking for in terms of spousal support, division of property, etc.

Robert’s appeared on ‘RHOSLC’ a few times over the years … and during season 4 there was a storyline about Mary learning Robert had secretly gotten married right under her nose. The wedding reportedly went down in August 2022 at a courthouse.

The estranged couple does not have any kids together and they apparently had been living in Mary’s Utah mansion … as best we can tell from the show.

‘RHOSLC’ also made Robert and Alexiana’s alleged drug problems a big part of Mary’s storyline.

We reached out Mary and her son … so far no word back.