Is it possible to connect different devices with iCloud, but exclude one of them?

My Apple ID is used for my laptop, my iPod, and will be for my iPhone once I get it at the end of the month. A month ago my mother purchased an iPhone and I let her use my Apple ID to make it easier for her and what not. I'm interested in using iCloud for my laptop, iPod, etc. But I don't want it to connect to my mother's iPhone. Is it possible to make sure our things don't go to each others devices? Or if I don't fully comprehend it, could someone explain it to me?

You inable and uninable iCloud! So yes! You have to tell it to use iCloud!