iPad and new iPod Touch, sharing apps?

[Yoshiki UK]

I'm a bit confused about something and was wondering if anyone could help me sort this out? I have an iPad and an apple id, and my sister just got an ipod touch for christmas. I set her up an apple id, but when i synced it with my itunes, it gave her my apple id. Now she can download the apps i have purchased without paying. This seems to good to be true, and i'm worried that the apps on my ipad will be removed. I have synced her ipod and my ipad since she downloaded one of the apps i have and nothing has been removed. We are manually managing apps on her ipod, eg when she connects it to itunes it does not automatically sync apps.

So can i download apps for her ipod on my apple id and have them on both devices? And is it ok to have us both signed in on my apple id?

Thanks.

 

[Kaykaykay]

Here's a relevant link:

http://www.ipadforums.net/ipad-help/57568-using-two-ipads-one-itunes-account-etc-etc.html