There's a logical, well-researched answer on just how long a couple should date before getting married, and hopefully mom's not rushing anyone because it's a while.
In an interview with Big Think recently shared by The Independent, biological anthropologist and Senior Research Fellow at The Kinsey Institute Dr. Helen Fisher suggested that couples wait at least two years before tying the knot if they want a lasting, successful marriage. She puts it this way:
"I’m not really in the advice business or the 'should' business. I think people should marry when they feel like marrying. But from what I know about the brain, if it were me, I’d wait at least two years because in two years you see the full cycle of the year twice. You see how they handle Halloween, how they handle Christmas or Hanukkah, how they handle summer fun. And to see that twice is, I think, important. And by the way, you can sustain that intense feeling of romantic love for two years."