Istredd isn't surprised that the other Thorne people accepted him rather than shied away. Lucifer said himself about how unique their particular group is. Everyone probably has shadows they're dealing with. They're probably all hoping to be taken on their own merits here.

He moves his hands to himself to get his tie off entirely but then he playfully puts it around Lucifer's neck instead. Istredd undoes the buckles of Lucifer's shirt because it looks like he has another one underneath, and they're supposed to be getting more comfortable anyway. They're not going to sleep in these clothes.

I'm happy you opened up to others. I want everyone to see you the way I see you. Istredd pauses and then wryly smiles. Well, maybe not exactly how I see you. He doesn't want everyone in this castle to be as in love with Lucifer as he is. That would get complicated fast.

"You're not still worried about being a placeholder, right? Have I convinced you thoroughly otherwise?"