blocked from a facebook profile?

[panadelias]

I wanted to block my boyfriends ex lover from my facebook profile because i saw she recently joined. so as i was in the process of blocking it. i could not find her profile, then i tried searching her and couldnt so i figured she blocked me before i got a chance to. so i log on into my boyfriends profile and and found her in a search, but again when trying to block her from his accout same thing happened. is this just a coincidence that we were blocking eachother at the exact same time? and if she did block us does that still give her the ability to see our profiles somehow?