Karrine "Supahead" Steffans is prepping a new book -- apparently about her love affair with Lil Wayne. The book is entitled How to Make Love to A Martian. The video vixen turned author released a video -- which described that she was pregnant in the past, possible by Wayne.She said in the video, "I'd been with him so long. There was no way I'd leave him for my husband. There's no way I'd settle for a life without him, but there was no way I settle for a life with him, a life on the road, swimming in a pool of women, when this baby in my stomach. A secret. How would I tell my husband? How would I tell my lover....a martian."