Really need tips

Our anniversary is coming up and I want to get something special for my husband. I already got him Christmas gifts but I wanted to get him something special between us for our anniversary. So I went online to Groupon and looked boudoir session. I found and booked one I like but still have never done this before.

The session includes:

Airbrush makeup and hair styling

2-2.5 hour session

3 wardrobe changes

1 digitally retouched 8x10 print

Matching high resolution image on CD

DVD slideshow of images

I have no idea what I'm doing. Any tips or advice? I have some cute lingerie already but don't know which ones to use or should I get something new? I'm still early in my pregnancy so my boobs look fantastic but I'm not showing yet so it's a good time.