I'm curious what the parameters are for this. I never seem to be able to get the option to come up and when I have (rarely) I don't remember what I did.
The (short) story; Two Sims, engaged (I'm thinking that the only way, once at this step, is to get married, but that wouldn't grant the LTW). I've been to her place. She's been to my Sim's place. They've been out in a group, on a date, at a party...nothing I do will get the interaction to show up. I've looked in both, "Romantic" & "Friendly" options through cold, up to extremely irresistible attractions.
So, are there "rules" so to speak in order to get the interaction to show? Thanks.