Just outside Sesimbra is this great boutique hotel in a country setting with the most wonderful service. The owners have another location in Brazil so half the time in Portugal and the other time in Brazil, carefully crafted to avoid winters. Every detail has been tended to, the pool is in a field with a large open cabin to lounge and read after a good swim. They also have an incredible library in the main house.
It is family friendly as well as a great escape for couples.