Hugs. My sister in law is very similar when we decided to tell her we were doing ivf. After 2 years, we fell and 16 weeks into the pregnancy we lost our bub. This was met with 'this really wasn't a natural pregnancy so no need to get upset!' Lovely woman- NOT!
It's amazing the types of things people and (family) say when you are doing ivf and they are meant to be supporting you. Good luck with your ivf, I'd be polite to her but not tell her jack sh!t anymore.