Need some mothers opinions

My sister decided to keep snapping photos, of which I kindly said "I don't mind you taking photos, just please don't share my pregnancy over social media" (this was requested a few times due to social media to me is just gossip and there are people through others I don't want them to have any insight to amazing pregnancy, husbands family we have no connection too are very spiteful and try to cause problems)

Me and my husband agreeded we didn't want our daughter/ pregnancy over Facebook, she was a planned baby and we are so excited to meet her in 2 months time. 

Now my sisters reaction when I requested this was "WELL IF YOUR ASHAMED OF YOUR pregnancy" she didn't finish the rest and she just gave me a dirty look and walked off. This alone has truly hurt my feelings and I found it a low blow, neither me or my husband are ashamed. If someone wants to be part of my life and family social media is not the way Togo, I'm only 26 but believe the old fashioned meeting up for cuppa tea and so forth is a way to be apart of people's lives!  Why do I feel so upset over my sisters words!