The "other sim" interactions

I use the Other Sims … interaction for a Sim who just got into a new relationship to inquire what their family/friends think about their new squeeze. Sometimes, I get a really funny response, and it's nice to know that my Sim really loves so-and-so Sim. One time I had my singer Sim and his then girlfriend go out to dine with his older brother and wife. Since the couple didn't seem too happy when they arrived at the place to the point where he went into the restroom and she followed him in there to rant at him! Nothing like airing out your dirty laundry in public. So, Erik being a compassionate Sim, once the two joined them at their table, asked his sister-in-law what she thought about Aaron, her husband. I had never seen this response before, but it had me a tad worried for them. "Oh, he's my ball and chain. We're married." Erik basically got the same response from his brother about his wife. Oi. Time to go on vacation, you two. I'll watch the baby for you. Take a nice LONG weekend in Sulani, maybe.

Thank you for the answer, though it sounds like you used the interaction on sims outside your curent plaid household?
That works fine for me the issue i have is that i can't do it within my houshold...
let say i make one with 3 sisters... were two are wrost enemies.. for some reason I can't make sister 1 and 2 trash talk together about sister 3. Though if I were to go find Bella Goth I can have Sister 1 trash talk sister 3 to Bella just fine no issues there... it's only when I wanna use the interaction within my own plaid household that it doesn't appear in the social menu.

It only works on sims outside your current household.