Who cares. DH will always be working class - his mother was a teacher, his father an engineer and they both grew up in absolute poverty. DH went to the local comp - but then O or C - don't want to blow cover - is a very successful professional and earns midway into six figures nowadays. He wears the stuff he needs to wear to work, has a massive book collection, adores fine wine and good music (but prefers my cooking to fine dining), reads the FT.
In his eyes he will never ever be middle class because his grandad went down the mine on his 14th birthday and he never mixed with the nobs back home. He is liked by everyone and never tries to be anything he isn't but still never feels completely at ease with what he calls posh people - except me.
DH has provided our family with its affluence and its middle class life style but my, probably upper middle class upbringing and support (and a few bob in the early days to get him on his way) have probably helped him with the confidence he needed to hob nob with clients and partners etc., in the earlier days, because I can "work" a room and natter with ease about little or nothing - or at least without giving an opinion (oh the private joy of mumsnet!) - because that's what I watched my mother and grandmother do.
Left to my earning power we would live the life of a senior manager probably, scraping for school fees and holidays and keeping up appearances on a crust. With DH we live the same lifestyle but don't feel the need to keep up appearances and for years I happily drove an old banger, the furniture's falling apart, the carpets could do with a clean, the cats are moggies, but when there's a stash in the bank and you have paid all the school fees in advance and can look the Head Teacher in the eye, you really don't have to flaunt it.
I even splashed out on a £70.00 suit from M&S at the weekend 
!