Most Helpful Guy
My mom did that with my GF when I moved far away for a job. Once a week my now wife would go over for dinner, on Fridays. It made them tighter. My mom probably knew it was serious with us as we dated for four years and engaged for one. I think mom was also making sure she was a good choice for me :)
Most Helpful Girl
If your son is getting serious with a girl, you make an effect to like her. Because you know that she is going to be in your sons life, and possibly give you grandchildren someday.