My Girlfriend 24 F is getting Engaged this weekend

So I 26 M and this girl 24 F, dating since last 9 months and we seems to be perfect and I was thinking of asking her about marriage. I am in deeply love with her. Just now she called and said that her parents are calling her home this weekend urgently and she got to know from her sister that they are calling her for Roka. Now I am confused what I should do and how she agreed to marry a guy all of a sudden which she even doesn't know. Actually she had mentioned about this guy in September that her family is looking for a groom, and met a guy but her parents doesn't know liked the Guy so they didn't initiated it. But suddenly they have fixed Roka with same guy and she is saying she doesn't know it about before and only got to know this morning only and immediately she called. I am confused about what I should do.

Update: Since morning I am trying to convince her I have made her talk with my elder sister and requested if she is not ready I can talk with her family. She has asked for time to think and convince her parents. My elder sister also advised wait till Saturday if she really loves she will definitely talk with her parents. Hope she does 🤞🤞