As I explained to you earlier on how to consider for personal leave.
In this case, we have not started working yet and there is nothing much for her to do now.
Her house is also far away from Yangon and shall take few days for traveling.
Now her reason is to attend the ceremony of her Aunt. This sounds not a good reason to go!
When bringing all reasons into our consideration, we can let her go in this circumstance.
Hopefully, you understand so that you can consider and judge yourselves in the future.
It's a logical way of thinking.