Congratulations on the wedding and the baby!!
You could get her a spa treatment in one of the DLP Hotels? I believe they do massages at Sequoia Lodge...
When you have a meal, ask if you can pre-order the Cinderella Slipper Dessert or a cake.... I think they do it at some places...
Also, I don't know if this page might be a help:
http://www.disneylandparis.com/uk/tailor_made_dreams/tailor_made_dreams.htm
You can have fun 'testing' out all the rides for when you bring your newborn!!
Remember to request the 'Good Morning Fantasyland' breakfast - as you are staying in SL, you can request to have the breakfast in Fantasyland at no extra charge. You can also have a character breakfast in Disney Village for I think 15euros if staying at SL...
You could email the hotel and ask what they can do for the room when you arrive - e.g. balloons, chocolate strawbs, champagne, bride and groom ears... etc... you don't ask you don't get
Have a good time!! (And Rock'n'Roller Coaster is ACE, don't forget to try it out!)