My DP's sister has always been cold and emotionally vacant (not the closest family but generally like each other's company). We have been together many years but I don't feel any connection to SIL despite the time. She makes it very hard to get close to her. We have always made polite small talk, ie, work (hers not mine), a new car, holidays, home improvements etc but nothing more.
I was pregnant last year, to which she said 'that's nice'. I then had a miscarriage and was hospitalised, we didn't hear anything from her. It was another 3 months before she got in touch, still never mentioning me or asking how I was.
I am pregnant again now and when DP told her she again said 'that's nice', DP said it sounded like he'd told her we were getting a cat. I've since seen her for the weekend and she didn't asked how I was, when it's due, said congrats, nothing. She acted increasingly strange over the weekend, ie, sitting out in the garden alone while the rest of us sat indoors and chatted; and picking at food in the restaurant, looking at the ceiling and not saying a single word to any of us.
Since returning from the weekend, she has tried to make contact by emailing pictures of her new car (with no words in the email), which DP ignored for a couple of weeks because he was so fed up with her. Last week he replied by email and sent her a pic of our scan. She hasn't replied. Do you think she's playing a tit for tat game and waiting to reply for a couple of weeks, or does she just have a major behavioural problem? And is this the weirdest SIL you ever heard of?! I've searched previous threads but none of SIL problems seems to be like mine.
PS. She has no kids, no motherly instincts, and married to a man much older than her.