Dream of Sleeping Next to Sister

Asalaam

I had a dream a while ago that my sister is laying in the bed which is on the road it’s clean double or King dude bed clean sheets and comfortable and I go and lay next to her and then my mum comes and says to me to get up and I take the quilt of me and look at her and say no I’m comfortable here and put it back on and when I am looking at my mum i notice that I am wearing silky nighty and then I go back to bed with my sister what does this mean?