Oh Lacey! I can't help laughing but my heart breaks for you too.
If Mowgli would stop running from her then she probably would quit chasing him. It's become a game for her as well as declaring herself at the top of the pecking order.

If it was me I would pull out the laser light and play with Kahlua until she can't play anymore. Then I would go do the same with Mowgli and Zelda and while they are all exhausted let them out together. Keep the water bottle handy and zap Ms. Kahlua everytime she goes after Mowg. Unfortunately some of this will just have to be worked out by them and that does sometimes involve violence and flying fur! You just have to do the best that you can to keep anyone from getting seriously hurt. A lot of times the aggression won't be as bad as it looks if the other one figures out to quit running! I would say that Kahlua is building up tons of energy staying in the bedroom and chasing Mowg is a good way to release some of it.

Oh the joys of multiple cats!