Committing suicide by giving birth to a child despite knowing it would kill her. As if adoption or surrogacy doesn't exist. Leaving her husband as a widow.
Leaving her newborn child without a mother who would forever feel guilty for her mother's death.
All this still wasn't enough, that she also asked her eight year old daughter to fix her father's love life.
Tina not only knew that Rahul won't move on after 8 years since her death, but also that Anjali won't have got married all these years until her daughter reads her letter.
Leave the fact that Anjali was indeed getting married. Tina expected her eight year old daughter to not only understand complex things like love, friendship and emotions, but also giving her an impossible task of uniting her father to a woman she never knew.
Some kids of that age still get their bed wet.
Imagine if Anjali (Tina's daughter) was not able to fulfill her mother's wish? It just would've added to her guilt that she couldn't even fulfill the last wish of her dead mother. The kid would've grown with a lot of issues if she had failed to reunite Rahul and Anjali.
People shit alot on Rahul for being superficial and even on Anjali for choosing him over Aman. But never seen Tina being criticized when she's easily the worst character in the movie.
No wonder this film hasn't aged well and even KJO makes fun of it. Because it's indeed really stupid.