Am I in the wrong here for refusing to hand over the photos of my sister and her kids when they were younger?

My sister, with whom I had a falling out, recently contacted our dad, asking him if I would give her copies of the photos I have of her when she and her kids were younger. I told her she could go to hell, and she wasn't getting the photos. Now everyone thinks I am in the wrong here and that I should give her the photos. Now I'm wondering if I am in the wrong here or if I have the right to not hand the photos over.

Some background. This is the sister who pressured me for months to allow her to be in the delivery. I eventually gave in and allowed her to be, but I asked her to take photos of the delivery. She did not take one single photo for me of my baby's birth. Worse of all, she robbed me of cutting my baby's umbilical cord because she jumped in and cut the cord without even asking me if she could do this. I will never have any photos of my baby's birth, and I will never be able to cut my baby's cord. She still laughs to this day about what she has done.

This is also the same sister who would not give me any copies of the photos she has of our mum who passed away.

To me, in my mind, Im like, Why should I give her those photos when she robbed me of having photos of my baby birth because she wouldn't take any for me and why should I have to hand over the photos when she robbed me of cutting my baby's umbilical cord and she herself refused for years to not give me any copies of the photos she has of our mum who passed away that I don't have.

Updates
8 mo
This is also the same sister who contacted child protection trying to have my baby taken off me but failed to succeed, before she tried but failed to make both me and my baby who was only a month old at the time homeless. This is also the same sister who has accused me of crap I haven't done and post crap about me trying to make herself look like a victim when I stand up for myself
Am I in the wrong here for refusing to hand over the photos of my sister and her kids when they were younger?
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