From my perspective, knowing that, from her own mouth, they have been robbed a number of times, she knew perfectly well that the intent of the crime is to get money, not to harm her or anyone else, and that she took the opportunity to get revenge.
One fault with your logic. Assuming that each robbery was done by a different robber with different MOs, you cannot predict, by the actions of the previous robbers, that the next one won't stick the knife through your heart.


