WHY?

Why does my family call and get cranky about something i bought my child for Christmas?It's really not no ones business!I bought Landen an Ipad for christmas..I bought it in November as it was on sale and a great price.She called me today and was right down nasty to me on the phone i told her it was not her business or concern what we do as a family.She said he wont be able to play with it.I argued about that as he uses one at school and its great for communication and learning.I cut her short and she hung up on me..It bothers me that my private life and what we do is out there..I have not told no one about the Ipad..My daughter Linda knows !