My girlfriend's parents are like this, they are not millionaires, but well off. I am a single man living on my own living paycheck to paycheck and my girls dad sees that (he also struggled when he was around my age). Her family ALWAYS makes extra food to send home so I have something to eat for a few days, they are just taking care of you like you were theirs, I had to get over that and realized that they were looking after me and not looking down on me.

2 things, 1, always be honest with your significant other, my girlfriend knows how often I do the business, she knows I'm a complete horn toad, 2, no comment on any of the rest of the story lol sorry bruh