Anonymous wrote:I will not expect her to eat with us but she will be welcome. I think we have assigned seats/times so if she wants to eat dinner In the dining room she will likely be seated with us anyway.
OP, I have never cruised Disney but from what I have read about their dining system, please do ask her to have dinner with you every night. My understanding is that Disney is on a "traditional dining" system (fixed time, fixed table, moving restaurants together with your table mates and your service team) - if she doesn't have dinner with you but is booked on your dining (because she is on your reservation and sharing a room with grandma, who I am sure will be at your table) you might be sending her to the buffet each night.
Please also make sure she knows if she is expected to join you for breakfast or if she may join you for breakfast (and if she doesn't because she was up late, please don't mind).
Also think about excursions - what have you planned already, is she welcome to join you, are you going to pay for it?
Do you feel safer knowing she is with you when you are in ports? If yes, have her join you (but that means you pay). If she doesn't join you for excursions, make sure she knows what to do in case she misses the ship (the daiylies, whatever Disney calls theirs, usually has a phone number for the port agent, make her take a picture on her phone and her camera), brief her on when to be bakck on board. Talk to her about keeping save both in port (where are you going? remember that there are unsafe areas in many cruise ports / cities) and on the ship.
Is your AP old enough to drink alcohol on board? If so, talk to her about it. Also make sure she knows that alcoholic drinks (as well as fancy mocktails or special coffee drinks) aren't included in the cruise fare. Does she have a credit card for her own onboard account? If not, come up with a plan NOW. Check if Disney does cash accounts, how much they require per day and ask AP if that's a sum she can cover. If not, you will have to put her on one of your credit cards but you will need rules about how much she can spend (and pay you back later).
Remind her to take something "fancy" for dress-up/formal/semi-formal night (a nice sun dress will do) and prepare her for pirate night

especially if you do plan to dress up.
Your AP will most likely be in the least represented age group on board. Make sure she knows that she may potentially find it difficult to meet people her age and to be prepared for it (bring plenty to read, music to listen to, download a few movies to her phone etc.).
Yes, since it is already expensive, why not just get AP her own room and avoid any potential fall out?
My guess? Because Disney is already freaking expensive. By having her share with grandma, OP saves on grandma's single supplement, which probably covers 50-80% of AP's cruise already. We are not talking about adding a $70 single room at a motel somewhere, we are talking spending another full cruise fare plus single supplement (which usually means paying for two minus taxes on the second person). Cruises also usually sail full, they might not be able to a) get their AP her own room or b) able to afford another full single fare for their AP.
If AP isn't 21 yet, Disney might also have rules about how far her cabin is allowed to be away from a guardian's cabin. I don't know Disney's rules. Could be that they are happy with her being 18 and they don't care but if I remember correctly some cruise lines won't let you cruise alone if you are under 21 and have certain restrictions about the location of your cabin (e.g. has to be max. two cabins away from somebody 21+ you are traveling with etc. I don't know if this stops at 18, when they are legally adults, or at 21).
Anonymous wrote:and at the last minute asked our au pair if she wants to join us.
OP, if you have already offered her to come, please do take her. You cannot take it back now. Yes, you can think of booking her into her own cabin (if you want her to work) but please, don't tell her you have changed your mind and she can't come after asking her.
You are also traveling with a back-up plan. You have grandma on the cruise with you. AP can help you on the trip to the port, then grandma can watch the kids on the cruise (if grandma usually lives abroad I am sure both she and the kids would enjoy spending some quality time together, from what I have read it's also more than likely your kids will love the Disney kids club) and AP can help with the kids on the trip back.
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A normal cruise maybe (staff is allowed to hook up with guests, Disney no); Disney there are no options for ap other than married men or older men playing nice with ex; and really just kids or couples settings.
And sorry but... PP, are you suggesting to take an AP on a "normal cruise" because there are more men her age available for sex? WTF? Are you kidding? You are aware that not every single AP comes to the US to find a husband or to screw as many men as she can find? Yes, AP might find it more difficult to find people in her age group (late teens, early 20s) on board because that's not really Disney's target group but making the assumptin that AP will have a bad time because she won't find anyone to sleep with it approximately as ridiculous as it gets.
Says an exA who would have loved to go to Disney (but couldn't afford it, went to Universal instead, without her HF), still has a Disney cruise on her bucket list and didn't come to the US to f*** around and get married (and thankfully didn't, I was nowhere ready for marriage at 19 or doing well enough financially to stay in the US, happy I didn't meet my husband until I was 25 and didn't get married until nearly 30).