It Happened One Night by Lisa Dale

This book sounds great, I've already ordered it!

Here's a little about it:
(Grand Central, November 09) Lana Biel longs to leave her family’s Vermont wildflower farm so she can travel and see the world. And her sister Karin wants nothing more than to put down roots and conceive the child she and her husband just can’t seem to have. When a lighthearted fling with a mountain biker leaves Lana expecting, she finds herself tumbling headlong into motherhood while her sister Karin can only look on.
For help, Lana turns to Eli Ward, a professional meteorite hunter and her best friend for the last ten years. But Eli’s keeping secrets that could turn their friendship on its head. As the Vermont seasons change and the flowers in the wildflower meadows begin to fade, Lana must make some meaningful decisions about her family, her friendships, her love life, and her dreams.