Without pictures it's hard to tell, but I would definitely clean her up, maybe try soaking her so whatever tape is left comes off without injuring her. Use Neosporin (just plain, no pain killer) on the spots that were damaged, and just apply that a couple times a day. If she starts showing signs of infection I'd definitely take her to a vet for possible antibiotics.
Oh, and make sure your little sister knows better next time, maybe you should keep your pet in a safer place to avoid her (I'm assuming) small hands.
X3 I also think a lock would be number one on my list too. Good luck to you and I hope your baby does alright.
0.1 Pastel Lesser Platinum (BP)
0.1 Dumerils Boa
0.1 Indian Sand Boa (Sunset)
0.1 Kenyan Sand Boa (Anery)
0.1 Kenyan Sand Boa (Rufescen)
0.1 Kenyan Sand Boa (Paradox Albino)
1.0 Kenyan Sand Boa (Paradox Snow)
And a lot of Tarantulas