Complex sentence: But Veronica has been busy lately, and when the tension between Veronica and Wallace's new girlfriend Jackie Cook escalates to the point where Jackie pulls a huge prank, Veronica, as is her nature, intends to get revenge.
Split into simpler sentences: But Veronica has been busy lately, and when the tension between Veronica and Wallace's new girlfriend Jackie Cook escalates to the point where Jackie pulls a huge prank on Veronica. And Veronica, as is her nature, intends to get revenge.