Found NSFW on my Wife's (36F) old phon

First and foremost, I was not snooping nor was there a negative event that caused me to look into her phone. Wife (36F) and I have just always held onto our old phones since forever. Now in market for another new phone, there's a deal that for every smartphone you "donate" you get an additional 20% off, also eligible to stack discounts. Easily between my wife and I we can get 100% off.

Prior to "donating" our old phones my wife asked me to do a sanity check and make sure that there aren't any good pictures/video saved onto the phones. If there are, pull them off and then do a full factory reset of said device.

First couple phones I go through with nothing major until I get to one of her phones. Found a folder labeled (not real name) 'Clark'. Clark happened to be the fling when wife and I were dating 12 years ago and had broken up. Wife and I are open about the whole situation and we're good. I go through the folder and see a bunch of SFW pictures on their dates and etc except for one. I knew my wife had mentioned that he had a larger cock but this thing was BIG. Doesn't change how I feel about my wife at all. This has now peaked my curiosity. I go over to her old phones text messages and sure enough, reading through, I found them sexting, occasional dick pics from him to her....then I find it, a video of him giving her backshots in the backseat of her old car. By the time I found the video I was already rock hard and couldnt help myself and pleasured myself.

Saved that video and told my wife about everything and she laughed about it. We talked about it and told me the story behind it and how upset she was about it at that time but glad I found use for it.