This is the age where there is a lot of stranger anxiety and separation anxiety. My girls were more apt to want me than their dad at this age. HOWEVER........I suggest you read "Protecting the Gift" by Gavin DeBecker. That inner voice you have that is raising a concern is real. Even though this may or may not be the circumstance that your inner voice is right, it is worth exploring. Mommas have a sixth sense about their kids....if something doesn't feel right, don't just write it off. No need to put dad on the defensive just yet. Does she have any suspicious bruising? Does she freak out when you change her diaper after a visit with dad? Does everything in the diaper area appear normal to you? I could go on and on with the questions, but if it is truly separation anxiety/stranger anxiety, you should be able to put your inner voice to rest (for now)! Good Luck!