Well since Mo appears to be the Wicked Witch of the East and Molly looks like the Wicked Witch of the West (or Southwest), a house will probably fall on Mo (The Slimes building), and Red Molly will probably ignite from self-combustion. After somebody throws water on her, she'll melt away. With that much rage, hatred, and bile stored inside those two, something bad has to happen eventually.
"... a house will probably fall on Mo"
For G-0d's Sake, somebody drop a house on that woman"