This question contains spoilers…
(view spoiler)[It's still Mawie:) I just wanna ask have you been inspired by the movie "50 first dates" by Drew Barrymore and Adam Sandler. When I am promoting your book to my friends, they are telling me that "ooh it's like that movie with Drew and Adam". Ofcourse I tell them it is not because it is a thriller and it has a whole different story but just wanna ask though. (hide spoiler)]
Hi Mawie - thanks for this question. I hadn't seen '50 First Dates' when I started the book, and I only watched it once I'd finished Before I Go to Sleep. I can see why people might think there's a similarity, but to me Before I Go to Sleep imagines what might happen once Drew Barrymore's character has aged visibly and her friends and family can no longer pretend nothing has happened.
(Thank you for your other comments, too. Not really a question in there, so I can't post other than to say I'm glad you liked the book!)