<human>: Can you succinctly summarize the text in 1-3 sentences?

Long story short: we (both mid 20s) dated/lived together for a 2.5 years and split up when she asked for a break (I have since learned what that actually means) a little over a year ago. She moved back home from the city we had moved to together and started seeing this guy (an old flame she had just recently gotten back into contact with before our break up) a few months later.

For many reasons, I ended up back home as well, and while her and I aren't "friends," things are cordial when we see each other. As we have similar circles of friends, it has come to my attention that he has hooked up with at least two girls over the summer who were under the impression that they had broken up (because he told them so), but ended under shady circumstances. As we weren't close anymore, I assumed that this was true. However, she just recently posted on the various social medias about their "anniversary," which would lead one to assume that no such break-up occurred this summer.

Although she may have broken up with me under less than ideal circumstances, I don't wish her ill will. However, is it not my place to tell her what I know?
<bot>: Ex asked me for a break, started dating dude immediately after. Found out he's been hooking up with other girls. Do I tell her?