Complex sentence: In a way, Momiji and Kyo were rivals in love, though Momiji's kind disposition made him give in and he jokes that if Kyo doesn't confess to Tohru, Momiji might try and steal her away.
Split into simpler sentences: In a way, Momiji and Kyo were rivals in love, though Momiji's kind disposition made him give in. Momiji jokes that if Kyo doesn't confess to Tohru, Momiji might try and steal her away.