When should marriage discussion be had

I wanted everyones opinion when the topic of potential marriage should even been brought up in a relationship.

I have been in a great relationship for almost 11 months now. We are both 45. She has been out of a divorce for 3 years now and I have never been married.

My GF and I are totally best friends who we literally can cry laughing every day, have a lot in common, and never go without saying I love you when we part or hang up the phone. Her kids really like me and us together. We have all been on trips together with family. Her and my sister talk alot which they both adore each other. SO...... all the pieced fit and marriage is a goal of mine and my entire family hope we get married and cant see one reason we wouldnt.

So a little event happened the other day that threw a red flag up for the first time for me. My mother has never met her and cant really fly 5 hrs to come visit due to knew problems. I was on speaker phone with her the other day and I mentioned I wish she could come out to visit. My mother said "I would make the flight if you got married" and my GF was right there. We both kinda smile and shook our heads in a jovial way.

Now.....after I hung up there phone my GF said "does you mom realize that they may never happen? I dont even think about that"

That hit me and has made me do a lot of thinking. Are we not even on the same page, or even want the same thing? I have always stayed away from that topic but now we are approaching a year together. At what point and HOW should this even be brought up. It can be very uncomfortable but I want to know at what point do I and fear that I may realize I am not in the right relationship and have to part ways.

I KEEP thinking of the saying, its not that she doesnt want to, but she just see it with you.

I need some advice here PLEASE

I recall bringing it up with my partner after only several months. I would think 11 was enough to see if you're both on the same page, myself. I talked about it too soon for my partner's taste- but I can also tell you if it'd been 11 months they'd likely have been telling me to $#%^ or get off the pot.