A second child would have to sleep on an extra single mattress on the floor. (gili-paradise.com)
There are several large sofas and single mattresses for sleeping more people if need be. (wavecation.com)
It has 2 bedrooms that has a double bed and one single bed in the main bedroom, and a loft with 4 single mattresses which is suitable for children or young adults. (travelground.com)