Marciano Brunette from "Vanderpump Villa" made a return cameo in "Secret Lives of Mormon Wives," stirring up some drama this season ... and he says he's feeling regret for some of his lies about the scandal.

Marciano claimed he and Jessi Ngatikaura had a sexual affair after meeting on their crossover episode ... and now he's feeling ways about that action. We caught up with the reality star leaving SUR in West Hollywood -- showing some support for former boss Lisa Vanderpump -- and he tells us he has regrets about coming forward about the affair in the way he did. Hulu/Disney via Everett Collection

He said he feels bad for his contribution to the rockiness of Jessi and Jordan Ngatikaura 's relationship ... asked where his relationship stands with Jessi now, Marciano hesit

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