It looks like Cyclone Sword is the Sunset Valley 'bike' in my current game!
The Sim I'm playing at the moment, Sierra, quickly found herself falling for Cyclone after meeting him outside the Bistro on her first day in SV. She asked if he was single, but he was in a relationship with Ayesha Ansari. After a couple of days of flirting and a cheeky spot of Woohoo, Sierra asked Cyclone to break up with Ayesha, which he did. Sierra and Cyclone became an official item.
Sierra then went on a 5 day vacation to Al Simhara, and imagine her (well, my) surprise when on her return, I hovered over Cyclone in the relationship panel only to see, underneath his traits, 'partner: Blair'. I thought Sierra was his partner! She invited Cyclone over, and I tried to instigate some sort of 'accuse of cheating' interaction but there were none to be found, and neither was there any option of 'ask to break up with Blair'.
So off I went to the Roomies household to confront Blair Wainwright - I had no jealousy related interactions available with her, either, so Sierra ended up calling Cyclone into the room and making out with him in front of Blair. She gave him a quick slap, but then continued talking to Sierra like normal!
I think Sierra might just ask Cyclone to just be friends. She can't deal with being second string!
I don't normally get my Sims romantically involved with townies, I usually make their future partners myself, so I don't know if all the townies are this promiscuous! My grand plan involved completing Sierra's LTW of Seasoned Traveller, then marrying Cyclone and having children. I don't want Sierra's children to end up with 10 different stepmothers, so I think I'll just marry her off to a Champs les Sims native!
Does Cyclone put it about in your game? Have you had any other amusing two-timing experiences with townies before?