Questions about example sentences with, and the definition and usage of "Laste"

A: Unnatural. I would say it this way: "During my last vacation, I went to Portugal as I do each year. I stayed in Portugal for a month visiting family and friends. I have a house in the north of Portugal, and I also have family in Lisbon. I can spend a week at the sea in Lisbon, and if my parents rent a house in the south of Portugal, I can stay there with them as well.