We first hear because we see Serena on the date with Carter Pot. After all, this can be a 21st century. They decided they will would save every penny of his salary increases and would live from all the amount he was making when they met together with money she would earn. https://Www.Sakediscoveries.com/blog/thomson-reuters-asia-pacific-employee-network-charity-sake-tasting-nov-4th-2009/attachment/p1040847-2/