<human>: Give me a shortened version of the text

I was in a 3 year relationship with the women I loved. I transferred to a military college as I felt like it was the best decision for my academic career. My ex stayed at our old college and after a semester, I flew back for her sorority formal. After that weekend she gave me her old iPhone so we could facetime and make the long distance relationship easier.

On my way back home, I looked at the phone and there were over 2000 pictures still saved to the phone. She thought she deleted everything. Going through them, I found about 20 dick pictures of different men as well as screen-shoted texts between her and other guys discussing the sex they had together. The time stamp on them was dated before and after I left for a different college. 

Once I told her about the pictures she said it was a "mistake" and tried saying she was pregnant after our weekend together which was clearly false. I broke up with her soon after as I felt betrayed. This was a year ago.

A week after we broke up she started dating another guy. A year has passed since our break up and she is now asking for the iPhone back. She said the phone is for her "dying mother". What should I do?
<bot>: Ex gave me her old iPhone that was filled with incriminating evidence of her cheating. A year later she wants it back.