I would take Eric's advice on how to respond. He has already kinda framed your responses and use that and tweak it. Keep it pleasant and short. Validate her. I wouldn't 'thank' her for anything, but I like how Eric used the word 'grateful', which I think is more appropriate. I stopped thanking language a long time ago and it was really helpful.
I also wouldn't send her any pics. She can see on IG right? So, let that be.
