My Japanese g/f invited me to her home for dinner to meet the folks when we lived in Okinawa...
Picture a 6' tall red haired blued eye future son-in-law walking in the front gate for the first time.
Dinner went well, if a bit quiet. But hey I'm not one for small talk when there is great home cooking around.
So after dinner Dad and the Gaijin have a few sake's.... and a few more...
Out of the blue dear Dad says "You Americans killed my Brother in WW2"
Without spitting out my sake' I just replied back "You Japanese killed my Uncle in WW2, we're even."
Another sake'.... and Dad replies "Even? but you're dating my daughter."
"True, but we did win."
The look on my g/f face was priceless. But the look on her Mom was well a bit chilly.
Nothing's so cold as a mother-in-laws kiss. And yes I did get invited back, quite a few times.