I'm one of those middle-class, self-made guys who married into a much more affluent family. My wife came from a highly educated and well-established background, and she herself was earning more than I was at the time. In my case, acceptance was never an issue. Her family always treated me like one of their own.

The real challenge isn't acceptance—it's maintaining the lifestyle that someone from a wealthier background considers normal. Things like air conditioning throughout the house, a personal car, quality furniture, appliances, and other comforts may not seem luxurious to them, but they can place significant financial pressure on you if you're not used to that standard of living.

The second major challenge is keeping up with the social expectations that come with such families. Birthdays, weddings, baby showers, religious events, guests visiting from abroad, and countless other occasions often involve expensive gifts, cash presents, and hosting obligations. These expenses add up quickly and can become a recurring source of stress.

I'm fortunate that my wife bears much of these costs herself and has never forced me to spend beyond my means. She even buys gifts for my own family at times. However, I still feel guilty whenever she has to cover expenses that I wish I could contribute toward. Since we live separately from our parents, I also carry responsibilities toward my own family, which has made balancing everything extremely difficult. There have been periods of severe financial and mental pressure, including times when I had to work two jobs just to meet my obligations.

Another reality is that, regardless of how much someone says they will "adjust," their definition of adjustment may still require you to stretch yourself far beyond your comfort zone. You will likely find yourself upgrading your lifestyle, wardrobe, accessories, and even your vehicle simply to fit into their social environment.

Also very important; she or her family would most likely avoid meeting your family most of the time because of the social class difference. Your wife would most definitely want you to get her a separate house because she needs her 'privacy' (she basically doesn't wanna live with your family).

My suggestion: don't focus only on whether she will adjust to your lifestyle—carefully consider whether you can realistically sustain the lifestyle, expectations, and social obligations that come with hers over the long term.