If you want to avoid next questions, just say "I do part-time SEO but PPD also seems profitable to me, I think I'll drop CPA and take a hand over Social Media as well" or something they can't understand, because if you tell them you make websites, they ask you how to make websites, what is Adsense, how to create ad unit and other booooring things you don't wanna answer. In addition you'll get mad when they ask questions like "what is keyword" while explaining Google algorithms for them.