We bought my sister in law a birthday gift last week..nothing fancy just got flowers and chocolates sent (chose her favourite chocolates as there's a bit of a running joke with them). Didn't hear anything from her until today and got a text saying 'got the pressie, cheers'. Told dh it didn't sound like she was very grateful and he said 'yeah, she's not really that kind of person'. Well, I don't care if you are that kind of person or not. As a grown up surely you should have the decency to know that when you get a gift you should respond in a grateful manner, no excuses, aibu? There is really no excuse!