我爸爸这样回答得,说我结婚了在美国生活就没有回来,,,
This is not a good answer. He should say, you are busy, and you plan to go back sometime in the future.
point:
1) you are busy, you will go back soon
2) They come to US to travel(Travel plan).They have money,they will go back
Before My/in laws parents come to US I let them go to Europe. This may not a good idea....
try again