There is a way, may I first suggest crating one or both so no further
fighting can occur, whenever you can't be with them. You are going
to be ALPHA and you have to claim both as YOUR'S and not London's
property. More will be by to advise and I'll try to explain more, later.
If you are committed to keeping London, it can be resolved.
Congrats on become a grandmother~GOD bless!