Tamar didn't understand why they weren't excited, and they said they needed more details and the reason she was excited is because she apparently knew more
about it than they did, and she tried to assure them that wasn't the case. then they asked when she met with these broadway producers, and she said "When we were in NYC" followed by their response of "When were u in NYC

"
So i guess they wanted to be included in any and ALL meetings, especially if their life story is gonna be on stage one day. It was likely reminiscent of all the other times they felt Tamar did little slick things behind their backs in business, but they still did too much.