Nearing 40. Bro cmk, how old are you btw? About 46?
You're enjoying her company. You're not motivated to be intimate with her. She's not a PYT, so lust is not in the equation I think.

By the sounds of it, you are searching for a soulmate and you reckon this is it. That is all good bro, but I have one warning for you. Becareful not to project what you want onto them. Just because you're at a riper age and looking to settle down, doesn't mean a woman at around your age (let alone having kids) must be looking for the same thing. A woman at 40 can be just as horny and looking for action as a woman at 20.

Who knows maybe this lady expects you to bonk her brains out once the relationship gets serious and you can't deliver on it, then what?

This is why I always think it is safer to err on the side where YOU might be disappointed, rather than HER being disappointed. You can't make your little bro suddenly be excited by her, but you can start with your little bro being stonked by her, and even if she's a cold fish, you can always relieve it by punting.