Google is really getting on people's nerves in past 2 years.
When someone adds you back, you got this message:
xxx added you back.
She wants to hear from you: start sharing with her and comment on her posts.
Instead of a factual notice, Google gratuitously added “She wants to hear from you”.
I suppose this is part of Search Plus Your World going forcefully down our throats. When is g+ gonna become like fucking facebook?