Is it normal for siblings to be that close?
Went to a friend's house for what I thought was Netflix and chill, but now I'm confused. She invited her brother to watch a movie with us. They spooned while watcing the movie and at some point he (playfully?) squeezed her breast and laughed and she hit him a few times and told him not to do that again. Later while they were still spooning I could see under the sheets that his hand were caressing and rubbing her thighs. When he moved his hand she put it back for him to continue. Sometimes he would hold her hand and kiss the back of her palm and I think he put his hand under her shirt, on her back though, not her chest. It was just awkward and I'm confused. Is it normal?