@happycatsaid: "It is just odd to me, that she said "I saw where your dh is on fb", when she knows d good and well she sent him a friend request."
I think you have unspoken concerns about this "friend". She would have had to have seen his page in order to send a friend request.
Of course that raises the question of why/how did she even know to look for his "real name" but at least she brought it up to you instead of staying quiet about the request.
Perhaps that was an invitation for you to volunteer that you too have a FB page in your real name and she was hoping you would ask her to send a friend request to you. Or, she was alerting you to your husband's page in case you didn't know.
What is good for the goose today will also be good for the gander tomorrow.