We broke up 6 months ago and she contacted me a week ago. We''ve fucked twice in 5 days and she has never mentioned her bf, as if he doesn't exist, yet her profile pic she's with him when she texts me on whatsapp

The problem is, at first I thought she was just cheating with me but now I'm starting to think her bf might either be a cuckold or it's an open relationship, which would be a huge turn off for me for some reason

Since she never mentions her bf, I don't want to neither, cause I thought it would sound like Im jealous or like I'm trying to get her back. I've never been a side dick before so Idk if theres rules to this. Is it ok to ask if her bf is a cuck or some shit or do I just keep fucking and stfu? She literally doesn't seem worried in the slightest about doing this and texts me from her personal number about going to a hotel. Like, are cheaters that open? Wtf.