My brother's just told us he and his fiancee are expecting a baby, the first grandchild in the family. 
Naturally, mum and dad wanted to ring me and chat about it, as it's very exciting. But tell me: is this normal?
My dad started off saying how he'd heard the news from my brother and 'we were trying to work out when it was conceived' (I initially assumed 'we' meant my brother brought the topic up, but I may be wrong!). I told dad brother had said 10 weeks to me. So then mum and dad started asking me where I thought it had been conceived as brother travels a lot - I thought this was a bit weird and to be honest, not something I fancy discussing when it's my brother and my parents!
So then dad says, 'and I asked her - not exactly straight out - if it was planned, and she said you can't plan these things'. By this point I was cringing for my SIL-to-be! After a bit more discussion with each other, mum and dad decided that it probably wasn't planned, but was a good things since 'she is quite old now' (she's 29). They then told me they were pretty sure SIL wants the baby more than my brother does.
I thought this was really rude and I told them both my DH and I had spoken to my brother and he couldn't have sounded more thrilled, I was sure it was great news for both of them and a great time to have a baby. Predictably, I've now been told I'm being stroppy and rude and don't know how to be a decent family member.
I know I'd be pissed off/upset if I were SIL and hear what they were saying about her - but am I being a bit over-sensitive given that they didn't actually say this to her (as far as I know)? Or is it the done thing to discuss the details of your grandchild's conception history?