Complex sentence: Inez's biggest pet peeve is when Matt calls her "Nezzie", though she is fine with Slider calling her that; when asked why by Matt, she replies, "he's... different", implying that she likes Slider.
Split into simpler sentences: Inez's biggest pet peeve is when Matt calls her "Nezzie", though she is fine with Slider calling her that. When asked why by Matt, she replies, "he's, different", implying that she likes Slider.