I highly recommend Marlene and Toni as the host in Rio. They are great host. They are very friendly, helpful and take good care of us and help to make our stay in Rio de Janeiro more enjoyable. They even cooked typical Brazilian food for us and it was delicious.
The house is conveniently located near Flamengo station and is very convenient to supermarket and eateries.
I would definitely stay in Marlene's house if ever I visit Rio in future.
God bless you Marlene and Toni.