The answer is: "Yadira was babysitting her little sister when she felt the earthquake." This sentence means: While an action was in progress in the past (Yadira was baysitting her little sister), another action occured (the earthquake took place).
This could be a very bad turning point but also good. If you maybe negatively take back your life or control it you can get into bad habits. But if you possibly take your life or control your life back, you can get out of bad situations, or toxic situations. These can both create big turning points in your life.
I hope you get the answer to this ( I needed points I apologize )
B hope this help have a good day