When it comes to being happy at work, guess which factor matters the most? The nature of our work? No. The money? Nope. OK, it's the people we work with. And, if you’re lucky, you have a work wife. This week we’re with Erica Cerulo and Claire Mazur, work wives and founders of the popular fashion and design website, Of a Kind. They’re out with the new book, inspired by their relationship, “Work Wife: The Power of Female Friendship to Drive Successful Businesses.” We discuss why these relationships are valuable (in more ways than one), how to take a friendship to the next level (i.e., starting a business together) and how to talk money with your besties, in general. In Mailbag, we answer your questions on the concept of gender-neutral investing and where to invest and save for the short-term. And since we’re on the subject of relationships, would you break up with someone because of their credit card debt? Interesting research in Thrive.