How Tia lola came to visit stay CLIMAX?

Tia Lola came to visit Stay on a stormy night while she was out looking for a place to stay. She ended up staying for the night and they all realized that they had a long time since they all lived together. The climax comes when Tia Lola gets sick but the family realizes that none of them will fall sick since none of them has seen each other for ages.