Anna left silently.
The car she pre booked yesterday using Uber is already here waiting a little far from the Danver family's mansion.
As she didn't want anyone to know that she is leaving this early, she hacked the security and tampered with it so in case they check, the footage will show that she left around six in the morning.
She is doing all this so that she can spend this extra time with her niece.
If they see that she left at six that means she would reach Country S's capital around nine at Max.
However, she is leaving at three and would be able to reach country S by six max.
She can visit her son directly and spend time there till nine or ten and go back to the penthouse in the building her niece is living in.
Later before leaving the country, she will visit her son once again with other's.
Morning however is her private visit which she can easily camouflage.