This is not about me, i'm pasty and I like it that way

A girl my sister and I grew up with is 10.5 weeks pregnant with a very unplanned baby.

She keeps putting up pictures of herself in the tanning bed on Instagram. She's the type that stays Oompa Loompa orange year-round. We're talking 5 days a week minimum in the bed.

She made a comment along the lines of "it's totally fine- no big deal." in regards to it. I am very non-confrontational but this just really bothers me, to the point I kindof want to say something. If tanning beds are not healthy for adults..how could it be beneficial to a pregnant woman? I Google'd it so I wasn't just upset for no reason and read several places that said that the first trimester is when everything is developing structurally and it could harm their spinal cord.

Would I be in the wrong for saying something, or should I just let it go, let her do her thing?

She puts up pictures of her appointment cards and I kinda want to call her doctor and ask what her thoughts on it are.