So, the teenage girl thing actually works in your favor. There are several tourist grade shopping venues locally that you can take them to with relative ease, and they all have adult themed things to do.
Citywalk- its universals Disney springs. You more or less walk past half of it to get to studios. It's always absolutely slam busy. Tons of restaurants, food, street entertainment, etc. Also, booze. Universal is sort of the anti Disney when it comes to that. They will sell you bud light tall boys in line for rides if they can. Magic kingdom on the other hand, no booze.
Disney springs is well, Disney springs. Lots of high end unique shops. Vera, coach, kate spade....others that girls like (idk). Lots of good food. House of blues is there, food is great (but expensive) and they do live music. (Saw pennywise there a few years ago, going to see drop kick murphys in March if I remember to get tix). They have an amphicar selection there, and they will let you out into the lake with one, albeit captained by an employee. Still fun. (Odd tip- they're all registered in Minnesota. Pretty sure I used to know the guy that owns them. He had lots of weird E36 M3. ). The AMC theater there is incredible, and they have a fork and screen option, full table service and a movie. I hear tell theres a harry potter movie out- might be worth it.
If you DO venture offproperty, there's still tons to do. Old town is Kissimmee is what happened if a state fair midway said berkeley it and parked right where they were, forever. Have a coaster called the mine blower- wood coaster with a barrel roll in it theres also all the stuff on international drive, madam tussauds, the bone museum, the Orlando eye (gigantic ferris wheel. Go at night) sea life, the improv, mini golf, the worlds tallest chair swing (no berkeleying way am I getting on that) more shopping, more good food, hell the worlds largest McDonalds is there. Theres plenty of ways to keep yourself busy without ever going near the mouse.
Disclaimer- I'm about like klayfish. I'm super into Disney. I love to go. But I can go for 3 hours, bang out some fast passes and whatever has walk on status (15min or less wait) and leave. I wont lie though, going over xmas to ANY park is a great way to never do it again. I did Hollywood studios ONCE during xmas, and it was enough to make me want to punch babies.
Edit- dont forget sea world. Blackfish only tells one side of the story. Tickets are generally REALLY cheap by park standards, and hey, they have a sushi joint across the street.