Pregnant; with my sisters boyfriends baby

When Ariana Schneider finds that she's pregnant, her whole world comes crashing down. Especially when she find it's her sisters boyfriends baby. After one night of drinking, she never thought her whole world would crumble into little tiny pieces. Her sister is supportive of her, but once she finds that her own boyfriend is the father, will she change her mind? What will Ariana do? Is adoption the right choice? Or will she keep the baby?