First time a friend, and after engagement

My fiancé has temporarily moved to Arizona for a job opportunity. After two years of living together. I go up there when I can and we just got engaged a few weeks ago. I found out an old Cali friend of mine has moved to Arizona and lives close to her. We used to be tight for a good couple of years until he moved away. Robin saw his pick on fb and thought he was cute, so I introduced them. He stopped by her’s last night. It’s 2 am here in Cali, 3 am in Az. And she just sent me this, followed ed by, “ I can’t wait to marry you!”