Complex sentence: Kimmy, rightly furious with Julianne, confronts her, while the other women watch, immediately siding with Kimmy and are disgusted with Julianne's dirty tactics.
Split into simpler sentences: Kimmy, rightly furious with Julianne, confronts her. To which the other women watch, immediately siding with Kimmy and are disgusted with Julianne's dirty tactics.