Delilah was celebrating her stepson's misery. She invited some of her friends to have fun in a lounge. Of course, she didn't explain her purpose in inviting them, because everyone knew that Alexander was her son, not her stepson.
The agreement between herself and Immanuel explained that no one should reveal the identity of Alexander and also William, who was actually not Immanuel's biological son. This they had clearly agreed upon and, up to this moment, all other people know is that the two of them are in the middle, fighting only because of the status of the heir alone.
Even so, of course, no matter how tightly they hide it, there are people who are sensitive and want to know what happened, considering that Alexander and William are brothers, but in fact their parents made them rivals
