John 5:19 Then answered Jesus and said unto them, Verily, verily, I say unto you, The Son can do nothing of himself, but what he seeth the Father do: for what things soever he doeth, these also doeth the Son likewise.
20 For the Father loveth the Son, and sheweth him all things that himself doeth: and he will shew him greater works than these, that ye may marvel.
Christ does what the Father had done and shown him.
And yes, Christ and his wife will one day have spirit children of their own.
Probably. There is only one who walked perfectly and atoned for those on this creation. If Christ's atonement covers his wife then it only makes sense that the Father in his mortal probation could have atoned for his future eternal companion.