Complex sentence: Sonny's girlfriend, Vanessa (Kristy Swanson), disgusted and perplexed at Sonny's contrasting and inconsistent conduct decides to end her romantic relationship with him--and also find a new much older man with more reliability.
Split into simpler sentences: Sonny's girlfriend, Vanessa (Kristy Swanson), disgusted and perplexed at Sonny's contrasting and inconsistent conduct decides to end her romantic relationship with him. Not to mention find a new much older man with more reliability.