Complex sentence: She would show her affection for Kraven by often being at his side and trying to say or do whatever she thought would keep her in his good graces; however, the affections were thwarted by his obsession with Selene.
Split into simpler sentences: She would show her affection for Kraven by often being at his side and trying to say or do whatever she thought would keep her in his good graces. However, the affections were thwarted by his obsession with Selene.