Bf “ex-date” is stalking me

Hi,

I recently got a new boyfriend. We’ve known each other for 6 months now and been seriously dating for 4.

I fell for him as I felt he was so sincere and honest with me. He feels strongly and was very clear on his intentions with me.

Ever since he started posting me in his socials, I started noticing that there is a particular girl who is always lurking on my social media and watches my insta stories without fail. Me and this particular girl do not follow each other.

I asked my bf if he knows this girl and he mentioned that he used to date her for a short while. He said he met her for 1 or 2 dates and that’s about it. I didn’t pay much attention thereafter and to be very honest, I’m not at all bothered or irritated that she’s watching my life consistently. After all, I’m not hiding anything and he wasn’t hiding me either.

Recently, I started to grow curious. So now I’m debating if I should drop her a friendly text, something like this:

“Hey! I noticed you’ve been watching my stories for quite a number of times. I’m totally fine with that. I think you know who my bf is, so I’m just wondering is there something I should know?”

I think it’s just a harmless text, girl to girl. Is it a bad idea?