Complex sentence: Karthikeyan had at first sought to marry Rukmini for her family's wealth, but he quickly realizes he will not receive any of these riches, as their elopement has brought disgrace on the family, and now they will disown Rukmini.
Split into simpler sentences: Karthikeyan had at first sought to marry Rukmini for her family's wealth, but he quickly realizes he will not receive any of these riches. Their elopement has brought disgrace on the family, and now they will disown Rukmini.