These are the ones I did not know about, but they contacted me from genes reunited and friends reunited, before I knew about findmypast and ancestry.
I haven't been in touch with them much since my husband died, however, as putting that on line makes it much more final, if you understand what I mean. In fact I haven't put anything online since then although I do check to see if there are any more strange cousins.
My mother's grandmother was one of eight. Her father was one of eight, so there are a lot of extra cousins I knew nothing about.
One of them has sent me all her family tree. Her great grandad was the City Treasurer in Hull. He had 9 children. My great grandmother was his eldest sister and was sensible, only having four children.
I have a family tree which is like a roll of wallpaper. It would take me years to contact all of the living, so I get messages from only a few of them, but once you have contact with one, you will find you keep getting messages from others you do not know, providing you give permission for your email address to be passed on.