Rude comments

So I have an assistant at work, she's not my specific assistant, but the overnights assistant manager. I work during the days, but she came up to me and told me I shouldn't have any more kids because I've called out a few times since getting in my last trimester (didn't call out in first and only did during second doctors appointments that were last minute and unplanned for). I didn't think much of it at the time of her saying it because she's a little bit of a ditz, but now I heard she was bragging about being rude to me specifically. I'm pretty offended and I feel like reporting it but at the same time I kind of feel like I should just let it go.

This is my forth baby I was planning on it being my last anyways, but I just feel a manager shouldn't be allowed to say things to people like that and then brag about being rude.

What do you think I should do?