Alex Zamora is spilling the tea on that wild scene from this season of "Perfect Match" where it seemed like she, Louis Russell , and Sandy Gallagher were about to dive into a steamy threesome ... but don’t get it twisted -- Alex says Louis can keep on dreaming.

Zamora -- the temptress from "Perfect Match" and "Temptation Island" -- made multiple appearances on this season of the Netflix dating show, and things got spicy once she came in and started flirting with already matched-up Russell ... giving him the bright idea of having her join him and his match, Sandy, for the fun. Netflix

TMZ reality podcast "Previously On..." had Alex on this week ... and she cleared the air, telling us she was talking about partaking in a threesome with her future husband -- not Louis! -- shut

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