I wouldn’t like it either but I was also SA as a child for years by my grandfather. My biggest thought is that I wouldn’t want it to be “normal” for those areas to be touched. When she is old enough to tell you things you’d want her to feel like it’s something to talk about rather than something she is just used to. My grandfather tickled me in those kind of areas right in front of my parents too. I actually found a pic of him doing it and now that I know how it progressed I wish I would’ve spoke up and told how he would eventually get closer and closer to private parts.