@Karsh Do they not teach history in school anymore? Compulsory education for children isn't really something that happened until the Renaissance, and even then it was basically only reading/writing/arithmetic up to ~age 10. Children were expected to help out according to their ability, and many were apprenticed to learn a trade by around age 12. Even when compulsory grade school was introduced, it was still a very common thing in farming communities for school to be on break during the spring planting and fall harvest seasons as the children would be helping.
Medieval time periods like this setting, if your parents died and you had no other relatives, yeah you found someone to take you in... you worked... or you died.
Not to mention she looks to be around 13 years old, which is around the time you can start working in modern developed countries as well. (In the US you can do basic stuff like foodservice at age 14 and a few things like newspapers or golf caddies are even earlier than that)