Bigchik needs us, and GASP!!!! 
Whoa. The end of her question has me imagining all sorts of angst!
She asks:
Hi Maryse. Spent hours trying to find this one.
Hero has an affair with the heroine on a business trip.
Later the heroine goes to meet her family and is shocked to find the man she had an affair with is her sisters boyfriend.
Its part of a series.
Anyone know it?
Madalina: Hello from Bucharest, Romania, Maryse! I think the book Bigchik is looking for is The Affair (The Evolution Of Sin Book 1) by Gianna Darling !
Keep up the good work because thanks to you and your blog I started reading books in English. Some years ago, I realized I had read almost all the contemporary romance/ paranormal romance books I could find in the library and there weren’t many books of these kind translated in Romanian so I started to look for English book recommendations and I found your blog. The first book I read was A beautiful Disaster by Jamie McGuire. So…. from that moment on, when I want to read something good, heart-melting and anghsty, I search for your blog. This is the first time I’ve summon up the courage to write a comment. Kisses!
Lesley: It’s by Giana Darling and its called The Affair – part of the Evolution of Sin Trilogy.
I am happily addicted to reading but I need to expend my book energy (especially when one puts me in an emotional frenzy - SO fun!). So, I release my feelings about the stories, by writing them down here. It's my book therapy. 
{ 5 comments… read them below or add one }
Hello from Bucharest, Romania, Maryse! I think the book Bigchik is looking for is The Affair- The evolution of sin by Gianna Darling !
Keep up the good work because thanks to you and your blog I started reading books in English. Some years ago, I realized I had read almost all the contemporary romance/ paranormal romance books I could find in the library and there weren’t many books of these kind translated in Romanian so I started to look for English book recommendations and I found your blog. The first book I read was A beautiful Disaster by Jamie McGuire. So…. from that moment on, when I want to read something good, heart-melting and anghsty, I search for your blog. This is the first time I’ve summon up the courage to write a comment. Kisses!
It’s by Giana Darling and its called The Affair – part of the Evolution of Sin Trilogy.
Thanks guys!!!! I just added your comments in the post.
And thank you SO much Madalina for your sweet comment. That made my day!!!
Comment and chat with us anytime, my friend.
Yay! That’s just the one I was looking for! Thanks everyone.Been following this blog for a couple of years.I check my email every day for info on latest releases.My favorite is Friday finds and readers recommendations. I’m a goner for intense,angsty books (high five Maryse..). And thanks again
Holy moly…MINE!!
And BIG HELLO to Madalina in Romania! Your name is gorgeous.