valentinesday
Get some candy hearts or chocolates and plant them around the house taped to a little sweetie love note where she will find them in the next couple days.
Send her some flowers delivered to her at work with the note saying something like "love that pretty smile, everyone is looking at you baby".
if she doesn't have a job take her out to dinner and have the manager personally deliver to her a bouquet or a gift. she'll have eyes on you and it will be a better surprise. I'll bet She likes it when your tricky sneaky and mischievous to please her. It says "your my main girl AND my other girl" lol.