Please imagine someone's father is going bankrupt because of a big change in country's currency value and all the family members are worried and very anxious and in this situation the family son has stretched on the sofa at home. The family daughter (his sister) sees him in that situation and wonders. She wants to ask him if he is worried at all or it doesn't make any difference for him. She begins in the way I mentioned below.
I would appreciate it if both of the following sentences sounds natural to be asked in such a situation?
1- Why do you stretch yourself out on the sofa?
2- Why have you stretched yourself out on the sofa?
For me, both work properly and mean the same with a subtle semantic nuance.