Christianity does not have a problem with multiple universes. In the original prayer the Our Father translated from Aramaic, read the last line....

Matthew 6:9-13

"(Therefore, this is how you shall pray:)
Our heavenly Father, hallowed is your name.
Your Kingdom is come. Your will is done,
As in heaven so also on earth.
Give us the bread for our daily need.
And leave us serene,
just as we also allowed others serenity.
And do not pass us through trial,
except separate us from the evil one.
For yours is the Kingdom,
the Power and the Glory
To the end of the universe, of all the universes." Amen!