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Wisteria Lane vixen Nicollette Sheridan and her fiance, freeloader actor Nicklas Soderblom, have split, according to People.com. "Nicollette Sheridan and Nicklas Soderblom have parted ways after a year and a half," said Nic's spokeswoman in a statement. "They ask that you respect their privacy at this time." The couple became engaged last December, while they were vacationing in Aspen. Since then, they have been fixtures on the red carpet. They were together as recently as October 15, when Nicollette hosted a charity auction in Los Angeles. There, she denied rumors of a split, saying "They should get the facts right before they print things." Nicollette was previously married to Harry Hamlin in the early 1990s. Since I'm already getting "why did they split" questions, I thought maybe we could all try to come up with some good reasons for their demise. Here are my guesses, then you share your thoughts ‑- or tell me that mine suck ‑- in the comments box below. 1. They were together just two weeks ago and denying rumors of trouble in paradise. Whenever anyone splits quickly, I immediately thing of one thing: cheating. That's the quickest way to get kicked to the curb. 2. One rumor floating around is that one of the housewives' significant others had a thing for women and men. Could the man in question be Nick? Maybe she found out he was playing both ways and dropped him. 3. Another rumor is that Nic has reunited with her ex, Simon Main, who is a convicted drug dealer (natch!). Nic was seen in Australia earlier this month having dinner with the dude. Nick was supposed to be joining her Down Under, but he cancelled his trip because he had to "work." Um, that can't be true because Nick's profession is currently "professional arm candy for Nicollette Sheridan." 4. Maybe Nick realized Nic is really a man.