first off, how receptive was she to you giving her the ssm book?
depending on your answer to that question I don't see a problem with giving her the 5LL book as long as you do it tastefully. I like the other things you're planning for the day. Perhaps you could work the 5LL book into a gift pack? ie...if she does read other books, how about a nice throw (blanket), a reading light (that attaches to the book very cool I got one for my h, he now purposefully sit's in the dark using it), a special valentines book mark, another off topic book for her reading pleasure all tied together with a nice bow.
then it's not just and here's this book I want you to read, it's part of a package deal.
