Is there a local place near you that makes tea? You could take her on a tour of the factory if they provide tours. If not take her to an expensive afternoon tea at a fancy hotel. The time away from the baby would be a treat for some or if she's not ready to leave the baby she can bring him/her with her. You might consider picking up a pricey silver teaspoon and have it engraved with a meaningful phrase or her last name or something. Present it with a new fancy tea cup or tea set.
I found this listing online for a place in Bainbridge that is called Churchmouse Yarn and Tea. They sell knitting stuff and tea stuff and they do tea tastings. Perhaps you could take her to lunch and surprise her with a shopping trip here. http://www.churchmouseyarns.com/
If that's too far there is a webpage with other listings here: http://www.teaguide.net/tearoomswashington.htm
What about something she might want but wouldn't indulge in for herself. I always love candles or bath and body stuff. Since I live in house with all boys I don't have girly stuff like that given to me often. It's not something I would go spend money on for myself so I really appreciate it when it is given to me.