My 16 month old girl having spent a wonderful two weeks with her father around (he is a teacher) has decided to start crying and clinging to mummy when he comes home from work. It is really upsetting him as they are so close. If we both go to see her in the morning she looks at daddy and starts crying and shaking her head until he leaves the room. We are both confused by this total clingyness but he is so in love with her it is breaking his heart when she treats him like this. Any advice?