Plus... your very first sentence here includes 'the first week.' The FIRST WEEK??
'Nuff said. You are pushing her into sex too fast. She wants to please you but is scared, and all you do is complain about it. Show a little LOVE. Love means taking it slow and tenderly and carefully and tons of holding, way before sex. If you represent some new trend in young people, I feel very very sorry for this next generation.