Is it weird to claim someone else’s pictures as your own

Since me and my SO have been dating I’ve noticed his sibling constantly saving the photos I post of him and re-posting them as her own.

It didn’t bother me at first but now it’s becoming more frequent I feel a bit weirded out by it.

She saves all our photos of our son, posts them as her own. All photos of our dog, posts them as his own and the photos I post of my partner.

I didn’t mind at first, it’s her brother at the end of the day. But with how frequent it is, I find it weird now

The one I find most weird it I took a photo of my partner in his scrubs before going to the OR with me before my caesarean. She took that photo and posted it for his birthday. There’s many photos of my SO; he’s not camera shy! So why that pic? To the audience on Facebook it’s obvious she wasn’t there. It was my surgery, only allowed one person in. It wasn’t a moment which she was involved. So why not post the moments which involve her?

It also irks me when she takes pics of our son and posts them with us blocked!