Characters
There's going to be twice as much love in the house as there was before.
— Marge ‧ The Simpsons

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker predicts that the household will contain twice as much love as before. Treating affection as something that can be doubled turns an emotional change into a simple measure. The line offers a hopeful picture of home without explaining here what will bring that increase.
Context reviewed