How can I delete a Husband/Wife added by mistake??

Try going to the profile through the tree view and clicking EDIT. Then choose the Relationship tab. Wait and see if there is something saying something about loading data and wait to see if the unnecessary wife/husband shows up. If so, you should have an option to delete the relationship. HTH.

Yes the unnecessary wife/husband shows up but I don´t see any option or way to delete it.

Thanks, I had to unmerge to find which one had the problem, and then it appear the option to remove the connection.