My sister said to me “your daughter doesn’t look anything like you, she’s so pretty”. How do I get revenge in a subtle way, to annoy her exactly as much as she annoyed me. Here is a picture of my daughter and a goat for reference.
Could you not ask your sister to stop crashing your daughter's photos?
I of all people know from gruelling experience the difficulties of maintaining that certain playful and coquettish over-the-shoulder pose, when malevolent goaty harpies like your SISTER lurk in the background, thirsting to pounce.