Jedi2155

You know, it's ignorant answers like this that make people hesitant to ask questions on here.  Why is it necessary to make someone feel like a jerk because they are not clear on an issue?  Are you that perfect that you know EVERYTHING without any doubts?  Have you ever been nervous about a VERY IMPORTANT subject and possibly question your own understanding?  I feel sorry for you and anyone else that lives in your perfect world.  Please, if you can't be sensitive, don't say anything at all!

Oh no, no, no, no....
1. Scandinavians in general are conflict/confrontation adverse and they do not resolve conflicts the same way, trust me on this one.
2. A "macho" American husband calling a Scando mother and attempting to put her in her place (which is what that is going to come across as) or fix problems is not going to go well. Actually had my Danish husband ever said anything to my mother, even when warranted, she would hate him forever.
I'm glad it worked out for you, but it wouldn't end well for most of us.

Oh this had me laughing. ? It is so true, all my friends and family ask me why on earth I wanna live in the US. To them, it's like I'm moving to a third world country. So much pressure for my husband to move to Sweden instead.
OP, sorry but to me you sound a little selfish. Your wife just gave up her home, her family, her friends and everything she knew to move half way around the world to be with you and you're complaining because her mum wants to see her twice a year?!?!?!
You said that your wife is very close to her mum. Is your wife the only child? If so, that's gonna make the separation even harder. Can't your wife take a driver's license and then she and her mum can do their own little trips when her mum comes to visit and you're at work? Your wife's gonna need a driver's license for when she starts working anyway, right?! No better time than present.
I'm also very close to my parents, especially my mum, and this is exactly why my husband and I had a discuss about family and the future before we got married. Discussing these things before marriage minimise surprises like these.

Simply, let she come to visit and you can drive them around after your work or on the weekends.
Tell her nicely she is most welcome at anytime to come and your wife should explain to her that you have to work and currently can't afford long vacation.

This doesn't sound like a scam. You'd expect someone scamming to get as far as travelling to the US and marrying and then doing the about-face.
Could it instead simply be a case of nerves? Visa in hand, leaving country suddenly a true reality? It's a big and scary thing to leave your life behind for a new one.
Before jumping to conclusions, I'd give it a reasonable amount of time for the realities of the situation to settle down and wait until she is communicating and her actual concerns/wants are known.
As others have said, a legal wedding outside the US will null her K1 and her entry and legal stay into the US, if she does use it, is also based on the legal US marriage. Also, the K1 has a use-by date, so there is a deadline for this to be resolved.