She looks like she's pretty stylish, so I think you should just ask her to dress in the nicest of her own clothes that she has that she doesn't mind getting messy!
If she doesn't do nude? Don't blow your load putting her in lingerie first. Do a tight fitting outfit. Show a little cleavage like a corset with leggings or something. Maybe some heels! Lay her down and make her into a big ol pile of pies! Or have her sit up half the time, lay down the rest. Make sure she lets it alll pile up and then rub it all in! Or the dresses with suspenders and all that are great but I wouldn't have her take off the dress. Make sure it fits right up top! Have her play in the aftermath mess with some "peeks" of the stockings or something like I said? If she doesn't do nude? Dress her up and then slowly get her into some nice lingerie sets! I think that will keep her interesting for longer! She's already got my interest! Good luck! you will do great! And all kinds of pies are fun. Prepare yourself for all kinds! Smushed? Thrown? Pie sandwichesall that fun stuff!
Polysimon said: Just noticed you said you were shooting on the weekend just gone, so looks like I'm too late. Ever mind, if it went ahead I'm sure it'll be great!