Complex sentence: Lakshmi tells them the reason that she came in the hostel to slap her lover Premraj who was a Casanova, who was in the hostel, and after he broke up with her she wanted to take revenge.
Split into simpler sentences: Lakshmi tells them the reason that she came in the hostel. She had a lover Premraj who was a Casanova, who was in the hostel, and after he broke up with her she wanted to take revenge.