Waiting until you are sure that both of you are committed to the relationship before introducing your child to your new partner pays off for everyone in the long run. When introducing a new partner to your kids timing is key. Because children get caught in the crossfire. Sometimes it may take time for children to accept a new person in their life. Because children take time to adjust to the change after.
What Lindelani is doing to Thembi is not fair. Because he loves Mbali not Thembi. He should just stop confusing his daughter as well. I doubt his daughter will react well to this because she really loved Mbali. Confused parents ends up confusing their kids.
It is too soon for Lindelani to introduce Thembi to his daughter. Or maybe he might be doing this to hurt Mbali the way he was hurt. He must not drag the poor child into his affairs. This is what depressess children.