I've mentioned before that my SIL isn't very involved in our lives, and DH and I are actually ok with that. Basically she does the bare minimum in terms of attending family get togethers and she has never tried to have a relationship with DH and I. It's not a big deal to us, we only make an effort for the sake of DH's parents.
But...the baby will be three weeks old in a few days and she still hasn't come to meet her. Which wouldnt be a huge deal, if it wasn't for the fact that she has made plans with us twice and never showed up. Today is the third time she said she was coming over, and she was supposed to be here at 1 and she's not here. DH texted her and she hasn't even left her house. He said she's being wishy washy and he gets the impression that she's hoping we'll tell her nevermind stay home.
She only lives 35 minutes from us, no kids of her own. I'm so annoyed because I had things I wanted to do today, and sitting around the house waiting for her to show up, or not show up, was not on my agenda. Grrrrrr....and now it's closing in on nap time, so we've basically wasted most of the day.

Re: So annoyed
Inconsiderate much? Please tell me they at least brought cake.
Nope. No cake, not even any interesting conversation. I was settling DD1 for a nap when they got here, so that took about 20 minutes. When I came down, SIL was playing a video game and barely said hello to me, and her boyfriend/fiance gave a barely there hello. DH and I ended up doing most of the talking - to each other, I guess, lol! - and they left within an hour of showing up.
The best is that they didn't once say a single word along the line of "congratulations" or "how are you feeling" or "how is life with the new baby". Nothing. I asked DH if they congratulated him when they came in, and he said no. There is something wrong with these people.....which is just further justifies the fact that we don't make any effort with them.