Sisters do that..
My sis sometimes only wants me to ping her to articles of interest.
*chuckle*
I've often thought about giving my sisters this website info but I'm selfish. I don't want them to know what I do. They have their secrets and I have mine.
My sister usually has her cloaking device on...so if we're online together, I can't see her, and she won't respond until she's darn good and ready! LOL!
But that's the way she has always been, so that's OK. If she wants to talk to me, she will. Otherwise, she totally igs me.