Living in Natalia's flat for some days is very pleasant. Her mother will give you a very warm welcome and shows you around, as well as answering your questions. Even if it's hot outside, your room will stay much cooler.
You have your own bathroom and you can use the kitchen, if you want. But it's more common to have breakfast and dinner outside in a "Bar de tapas" or in another small restaurant.
If you like sightseeing, Natalia's flat is perfect, because it's located very central in the nice historic part of Seville. Only around a 15 minutes walk from the Cathedral and other nice places to visit.