Nice to know that your girlfriend's parents are portuguese. From where they are?
Lucky man, now you'll know what is portuguese food and portuguese wines. Ask for them some Oporto wine. Taste it and then tell me how it is.
Here's a little gift for them to remember their country.
My name's Paulo, I live in Oporto (the 2nd biggest portuguese city). I'm Fire Chief and the President of the Portuguese Volunteers Firefighters Association.
I hope we can exchange knowladge and become good friends. Who knows, one day we'll meet.
Keep in touch.