We first hear it as we see Serena on a date with Carter Container. After all, this can be the 21st century. They decided that would save every penny of his salary increases and would live off the amount he was making when they met in addition to money she'd earn. https://bookmarksoflife.com/story3650534/shorl-comml-public-w3c-dtd-html-4-01-transitional-en