Simone adores teasing her sister Cath a lot, so much that she is easy to react, to the point of annoying her and it amuses her a lot.
That's why when she sees her sister Cath getting fat a lot because of the winters, Simone couldn't help but tease her by playing with her little sister's big belly and complimenting her, to saying that you have finally become comfortable, my dear sister. As comfortable as me. XD
That embarrassed Cath, especially as that she gets her belly touched, but was complimented by her sister. She doesn't know if she should get upset or feel complimented for putting on weight.
