A tangled web...

So we've now moved on - we've redefined marriage, and husband and wife, and now it seems we're changing the meaning of mother.  This arises because Elton John and his partner (husband?) David Furnish have two children who were born to a surrogate. Again I have no problem with that arrangement, but the children need birth certificates and on those certificates David Furnish is entered as the mother. Can't help thinking that things have gone a little crazy!