You've got it all wrong! It's not interference, but merely Mom trying to help her baby in the last step before leaving the house! (Just kidding, it's really interference.) This is a phenomena that seems to be common to all cultures and age groups. The only couples that I've seen without meddling (oops! I mean helpful) mothers, are those who don't have any.
Believe it or not, they really aren't trying to make you miserable (well, maybe a few are) but trying to help out. If one thinks about it as a parent, once your children start to get married, they leave the house and are off starting their own life with someone else (who is lucky to be marrying your child), so it's natural to want the best for your child. Unless one is a parent, it's hard to describe the love-hate relationship that goes on between a parent and child.
When the baby is first born, all wrinkly and cooing, there is a tendency to want to protect your little one and nurture them. After a few years, the pendulum swings the other way as the toddler starts to torture the family pets or uses your best lipstick to write words on the wall or gives younger siblings toilet water to drink so the parent can't wait till the child is gone.
Once school starts and your child starts to make friends and hang out with them. Feelings start to swing again toward, wanting to be part of your child's life but they're more interested in going to the mall or texting friends. Television, video game computers, computers, etc. all start to eat into the time you once had. If your child plays team sports like cricket or football, the amount of time you can interact, gets even shorter. After a while, you feel like you're running a hotel with your child constantly coming and going.
College pops up before you know it and suddenly your little one is packing up to head off to school. It is an adjustment and you comfort yourself with thoughts that sooner or later they have to come home on holidays. After making many promises to call or email, you notice the gap between them, start to grow as time goes on. Then the day you've been dreading comes, where your precious baby says they would like to bring someone by on holidays for you and Dad to meet.
When your child arrives, the inspection starts. Is this friend the right sort for your child? Are they smart enough? Polite? Well groomed? Helpful? Cultured? Gold digger? Druggie? etc, etc as you wonder just what the heck it is that your child sees in this person. Aha! You finally notice they don't comb their hair. That obviously means they're slobs which makes them unfit to be with your child. (Never mind the fact when your child lived at home, most of their clothes was tossed around the room or under the bed and not in the closet.)
Now the helpful mother will start to make suggestions that perhaps the friend isn't the right sort of person to hang out with. The reaction from the child is predictable and they are resentful and frequently very vocal about being able to select their own friends. Mom starts to drag out stories about relatives and friends who ended up with the "spouse-from-Hell" and were unhappy for the rest of their life. The child refuses to believe that could ever happen to them.
The help continues even after the child marries the friend and mom arrives with a steady stream of fault finding in hopes the child will see the light. Unfortunately many times that never happens and it is ironic that all this meddling is not done maliciously but done out of love. My advice for Moms is sometimes children have to learn the hard way. Knowledge easily offered is quickly forgotten. So trust your children have been raised to make the right decisions on their own and don't nag them....sigh...I wish my Mom would do this.