Pregnancy photographer???

So my sister is around 5 months right now and she’s feeling a bit insecure about her pregnancy because of her husband who’s not giving her positive support. I want to cheer her up and I thought maybe a pregnancy photoshoot would help!! I live in ATL, GA but I’m going down to Gainesville, FL (she lives there) soon and I think I might do it then. I haven’t approached her about it yet, (I want it to be a surprise) and I want to know what you guys think? Especially from those who have done it before. If anyone knows a photographer down in Gainesville that’d be helpful!!! Also when is the best time throughout the pregnancy to take the photos?? I don’t want the photos to affect the baby!!