Complex sentence: As an extension to the already established Mitchell family, Ronnie quickly became a prominent character, taking over the nightclub, before forming a relationship with her business partner, Jack Branning (Scott Maslen).
Split into simpler sentences: As an extension to the already established Mitchell family, Ronnie quickly became a prominent character, taking over the nightclub. Not long after that, she formed a relationship with her business partner, Jack Branning (Scott Maslen).