What are the signs or behaviors of incest taboo? I have a friend who has a 13 years old daughter acts very inappropriate with him. She is almost fully develop and the clothes that she wears and the way she acts really display that there are something very strange between her and her father. These are the behaviors that she behave: Sit on her father's lap like two adult make out, sit her bottom on her father's face, put her breast on her father's face, every time she walks by him always brushes herself on him without say excuse me, when he talk to her her breast will press against his body part, when he lay in bed watch tv she'll lay on the side of and cuddle her legs on his, she wears spergatti straps tops all the time where shows half of her breast, she will wrap her arms around his arm and his arm press between her breast, and she will hug him like partners hug each other. He never said anything to her about what is appropriate or inappropriate. So I am really curious about it.