I wonder if she's simply going to ask to join Desir's party just like that. She's kind of stoic and taciturn, so she might just go to the morning practice without saying anything. It could as well be up to Desir to ask her to join.
That conversation went in a very interesting turn. Is he suggesting that the two of them are engaged to be married? Dirty old man doesn't just want status, he wants a teenage bride to go along with it too.