Girls, Would you have sex with your best friend?

Hi, so one of my best and closest friends asked me to have a kid with her in the future.
She said that, if by the time she was 35 and single would I give her a child? She was dead serious. And I've been told this before by other girl friends of mine but I don't take them too seriously.

She used to be my girlfriend back in high school, we dated for 2 or 3 months but it didn't worked out. That was 10 years ago. We've been friends since we broke up.
I am her best friend and I've been with her trough thick and thin.

I do love her but not like that anymore. If that makes any sense.
Besides, I'm deeply in love with someone else right now.
My girlfriend and I broke up a couple of months ago and my best friend knows this.
She's been behaving "different" towards me and giving me "girlfriend" style compliments and vibes. She's also talking a lot about having sex and other stuff with me.
She's been asking me out a lot too recently. It's not like her to be like that with me.
I don't know what to do. I'm freaking out.

Anyway, Thanks for your time and for reading.
I hope you can help me with this situation and that you're doing ok with the pandemic and all.
Peace!
Girls, Would you have sex with your best friend?
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