No, not really. It is sometimes more problematic to get more than one piercing at a time in a smallish area, but this should be fine. Of course, it is unwise to get a tattoo underage, and any artist happy to tattoo you without asking for ID will likely give you a disease or two, to boot.
About the under age thing: check her profile, she'll be legal soon. And Peace Attack, what is and isn't wise is up to you. If you're having reservations about it, its probably for a reason. If your intention was to simply ask if it would be problematic in terms of healing, I'd say no.
Evryone's body is different, and heals at different rates. What is no problem for one could take forever to heal on another. The more you get done in short period of time, the more difficulty you body will have coping with the trauma. That said, if you're in good overall health, the two shouldnt be unusually difficult to heal. But, like I said, everyone is different. JJust make sure that you are eating right, drinking a lot of water, don't have a cold/flu, get good sleep, and avoid getting drunk. All the things you should already be doing to keep yourself healthy. Have fun
Not unwise perhaps, but expensive for one day I feel. And also, it's sooooo amzingly rejuvinating and satisfying geting these types of things done, I would want to spread out the change and joy, but that's me personally. Deff just do what you feel is right.
i've had 2 piercings and a tat done in one day because of time constraints. it was a rush but it did seem to take longer to heal; maybe that was just me. it involved three different sites.
not unwise. depends on how keen you are, and your thresh-hold for pain. it does mean more aftercare though! Make you you do take care of whatever you get