Complex sentence: At first sight, Gregor believes her to be stuck-up and conceited; this feeling only increases when Boots asks her for a ball she had been playing with and Luxa will not let go of it.
Split into simpler sentences: At first sight, Gregor believes her to be stuck-up and conceited. This feeling only increases when Boots asks her for a ball she had been playing with and Luxa will not let go of it.