Adam and Sheree's Family Business is the second book in this series. The first one was Adam and Sheree's Family Vacation.
If you haven't read it, you might want to (because it's pure,
unadulterated smut) but it's not an absolute necessity. If you want to
start with the sequel, have at it! It's full of homemade porn, group
sex, and... just... smut. Yeah. Wow. Filthy smut.
Buy from the Publisher, Excessica's taboo "Eden" Imprint: http://excessica.com/eden/index.php?main_page=product_info&cPath=30&products_id=179
Barnes & Noble: http://www.barnesandnoble.com/w/adam-and-sheree-x2019-s-family-business-giselle-renarde/1116893547?ean=2940148682998
Rainbow eBooks: http://www.rainbowebooks.com/store/product_info.php?products_id=11835
Like the first book, Adam and Sheree's Family Vacation WILL NOT be available from Amazon, All Romance, or BookStrand--they don't allow smut this filthy on their sites.