Found pics of my gfs old bbc fuck buddy on her phone. What does this mean?

So my girlfriend used to have a black fuck buddy over 6 years ago that she's mentioned before (told me who he was, and showed me his facebook). They're still "friends" and I see that she likes alot of his pictures on his social media still. We have a pretty adventurous relationship and enjoy having kinky sex alot, she likes to be dominated and used like a slut. Anyways we've explored a bit together and ended up having her first threesome with me and my black friend. She was nervous but after the first move was made she was 100% committed to taking his cock and letting him fuck her however he wanted! It was one of the sexiest things ever, she was creaming all over his cock, screaming and shaking from all the orgasms, and squirting everywhere the whole time. It's been a few months and we haven't done anything like that again since it's hard to find discreet people where we live. I've been trying to get her to find another black friend she could have fun with, but she says it's difficult for her but she was trying.

One night she fell asleep with her cellphone unlocked, so I decided to see what was on it. Looked through all her photo albums and there was nothing out of the ordinary except a few old nudes I hadn't seen before. Right as I was about to put her phone down I see an app that is for private photo and video storage. After a few tries I was able to figure out her pass code and I was in. First picture I see is a full frontal snapchat of her black fuck buddy, his cock rock solid, with the caption "you better be ready". As I scrolled I found more pictures of him naked, him stroking his cock, and all the dirty shit he'd say to her. She also kept screenshots of her nude responses, usually with something extremely dirty written on them. It made me feel really jealous but turned on at the same time. So I closed the app, locked the phone, and went to sleep with a rock hard cock.

I haven't talked to her about this, but now I want to see her take bbc all the time. What do you guys think, is she still craving his cock?! They haven't been together for 6 years now but she still has his pics in a secret vault. Is she a permanent bbc slut?? I don't see why else she would keep his pictures after this long if she didn't still think about him fucking her, or wanted to still fuck him.