I don't post photos of DD on social media but I do send pictures to my family & DHs family via WhatsApp.
I've never explicitly said not to share photos on but in my family at least, it's a given that they either show someone from their phone or they have been known to ask if they can share her photo to x.
My SiL has in past sent a photo or two to her SiL via a "family" group chat that I happen to be in. I have also sent the odd photo but mostly I only share in the group with just my 2 SiL, PiLs and DH as that is our family inner circle. These previous photos being shared haven't bothered me and so nothing has been said about sharing photos but recently SiL shared on some professional shots that she had been given viewing access to by DH via Google Drive and it's really bothered me. AIBU to feel this way and should I tell her to stop sharing these personal photos on or do I just let it go?