Why would wife’s sister keep a pic of me stored on her phone?

Like the post says. So my wife’s sister was showing us a photo and when she clicked out of the album, you could see the photos she took before that one. Well I saw that she saved one I sent in our group chat. I had sent a pic of my burned shoulders and chest so I had no shirt on. But my question is why would she save that? I’ve had thoughts that she’s into me by some of the things she does. Is this just one of those things you think?

Why would wife’s sister keep a pic of me stored on her phone?
Post Opinion