My daughter is 7 weeks old now. My husband has 2 brothers and 1 sister. One of his brothers has been in constant contact with us about our baby. My SIL & other BIL haven't even acknowledged her existence. We've tried contacting them on fb to make them feel apart of her life. I sent out birth announcements the week after she was born, too. We used to talk on fb at least once a week until I got pregnant. I just don't get it... I think it's rude bc it's not like we got a puppy... It's their niece!
Re: I think it's rude...
It's just strange!
They may have reasons for lack of communication. Could be any number of things they are coping with. Be patient, hopefully they will contact you and have a logical reason for being distant. And, if you find out they don't have a good excuse, just try to let it go. It sounds like you all have good relationships up to now and wouldn't be worth losing over 1 thing (though the birth of their niece is and should be recognized as a big deal). Try not to stress yourself out over it too much.
Also, my SIL didn't like the name we chose. I had almost forgotten about that.
My mom had went off on my grandmother because my daughter was almost born August 7th (my grandfather passed away on that day 7 yrs ago) and my grandmother was freaking out and my mom told her a baby comes when a baby comes and not to tie in a tragedy with a joyous occasion.
Perhaps SIL signed up for 2 more tours because she can't have kids (or more kids) and it will be distraction?