Dating

Would I be out of line if I asked this guy if this woman is his girlfriend?

Three years ago this guy cheated with me (he was in a relationship) we slept together once. And then a year later he tried to sleep with me again but I didn't sleep with him because I didn't know if he was in a relationship or not. I see him a lot where he works because he's a cashier at a store I go to a lot. When we see each other he'll tell me what he's been up to. And he'll ask me how I'm doing etc. Once he saw me laughing and talking to one of his coworkers and he interrupted our conversation.

So I notice he's always standing next to one of his coworkers. And when he's near her he doesn't speak to me. Today I saw them together and when I came in I saw him walk away from her. I've also seen pictures of them together (it was him, her, and another one of their coworkers). And on one of her other social media accounts, I saw a picture of them with his face cut off.

When I see him again I'm going to say "I didn't know your girlfriend worked here too" just to see what he'll say. Sometimes when I see her she looks at me and smiles.

Would I be out of line if I asked this guy if this woman is his girlfriend?
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