Do married people make some mention of it on facebook, even a pic?

[neveragain]

I really need some honest opinions..nothing mean. So I'm dating someone for one year now. I pretty much ended it today. I saw his " ex" wifes facebook page. There are no mentions of him, no pictures of him at all. They are all of her and some friends or other guys. He is not even a " friend". But I did notice a picture where she is wearing a ring on her wedding finger.
Could they be married still? He's with me most weekend nights? We talk all day long....how did he pull that off? Maybe I am being paranoid.
Its seems a married woman would make some mention of a husband...all pics are sexy pics with friends or guys...but I did see that ring.
Any ideas? Thoughts?
Thanks