I'm thinking of printing and posting a family picture of my SIL that she fixed.
Why are you printing off a picture that she fixed?
I want to show people what she did.
You shouldn't post pictures of other people on your social media without their permission. They would be upset and it could cause problems in your family.
Do you really think so?
I do, it might make her upset. She has the picture herself so if she wants to post it then she can. It would be good to stay out of it.