Am I wrong for demanding privacy in this house?

[Donna]

It is your moms house so maybe instead of coming up to her complaining about your sister, come to her with a plan. Give her suggestions or answers that she can see your not a kid winning and tattling on your sister but an adult that needs your own space. The computer should be in a public spot but maybe if you moved it out of your room your mom wouldn't mind letting you get a lock? That suggestion my relieve her of some worries and show her you mean business. See if you can come up with one you like and present it to her as a solution and you'll more likely hear a yes.