This was dated 19.05.06, and I'm about to check for updates again (updated quite a few yesterday).
Only thing I can think of is the two female sims are both extremely outgoing Leos (they were both in love with Jake as teens, and since I have teens don't lose loves, even though Trixie is engaged to Dustin, I suppose in her sim mind she was in love with Jake first
(And although I have casual romance installled now, I didn't then!)
The only explanation I can really think of is - too much champers!