I was divorce when my son was 2year-old. He is 3.5 year-old now.He lived with his dad. I pick him up and have him sleep over my house every Friday. When he was with me, he was happy outgoing boy. As soon as his dad showed up or he is with his dad, he act very shy and distant from me. He refused to hug me or even look at me when his dad around. I live with my parents. My son act very out going with them too, but the same, when his dad showed up, he act shy and distant.