It's entirely possible for her to be inexperienced even if she had ex boyfriends either way though, talking to her parents is not very helpful, you should sit down and have a conversation with her and ask her kindly about why she refuses to be close to you and express how you have been feeling. She either 1) has been in relationships without being physical at all and does not know how close people are because in my culture I have never seen parents be affectionate with one another, 2) may have married you for material reason only. 3) maybe do some introspection, are you treating her well? If you are yelling at her or anything of that sort she may feel resentful