Looking for some advice on how to handle this situation as it's getting me down and I don't want it to cause long-term damage in family relationships.
For full context, BIL and SIL are a few years older than us and have 2 DC, age 6 and 4. We have one DC age 2. We have always got on well with them - not super close due to living 1.5 hours away, but make an effort to see them, reacted with happiness when they announced each pregnancy, try to spoil our niece and nephew when we see them. We only meet up in person around 5 times a year, so it's normal to share news via FaceTime if not seeing one another soon.
DH messaged to say we had some news we wanted to share and asking to arrange a FaceTime. They would have known this was very likely to be a pregnancy announcement as we're already married, moved house last year, both in relatively new jobs, so not much else it's likely to be! They were slow to reply and quite non-committal on times, cancelled on us at the last minute first time we arranged. We eventually managed to arrange a time 10 days after DH's message - their choice of day and time. When BIL picked up, it was just him and he said SIL was busy doing bedtime. We said no problem, let's call you back in 30 mins so she can be here too. He said not to worry, he didn't know how long she would be and he would pass any news on. This was a bit deflating as we wanted to share our happy news with both of them, but it seemed odd to push it when he'd said no, so we announced the pregnancy to BIL on the call and he said all the right things - congrats, very exciting, the kids will be happy to have a new cousin, etc etc.
I expected to get a text from SIL later when she heard the news but...nothing! It's been two weeks now so it's not that she hasn't had enough time. I'm obviously happy and want to share the excitement with DH's family and she's the one I would usually message but it feels way too full on to message and check she's heard the news?! So now I'm left wondering - did BIL actually tell her? If he did, why is she not happy and why hasn't she congratulated us? Is there something wrong? And how on earth do I act when I next see them? (Likely to be early March so I'll be showing by then). The whole thing is just really weird and out of character. The only thing I can think of is that she could be having some sort of fertility issues herself, but then she does already have 2 children, which we happily celebrated with her, and would it really be too tough to just send a "heard the news from DH - congrats!" text? Or maybe to ask how I'm doing? She was really good with my first pregnancy so I was probably subconsciously expecting a similar reaction and the total lack of response has just left me feeling a bit...meh :-(
I know I can share my happiness with my parents and friends as well but family ties are important to me and she is the only other woman of our generation in either family, so I'm feeling quite sad that she doesn't seem at all interested or to care :-( Not sure how to handle this one going forward and any advice would be appreciated.