I'm going to try to keep this as neutral as possible, as it seems DH and I both completely believe we're in the right, despite our opposing views. Also going to try not to drip feed.
We've been together two years, married just over a year. We both have DDs from previous relationships. Mine (12) lives with us and goes to see her dad overnight at the weekend; his (13) stays two nights a week. My DD has some SEN, and coupled with the hormonal chaos of being 12, can be quite hard work. I also work 25 hours a week in a job that I love, but that can also be stressful and a bit overwhelming (social work).
A couple of months ago, DH told me that if I won't dress up for sex - ie. stockings, suspenders, thong, basque, whatever - he can't see any point in our relationship continuing. I was absolutely flabberghasted. It was like being kicked in the head. He did apologise, and we patched things up a bit, but he keeps coming back to the same thing every time we have words. He says that it would make him feel wanted and appreciated, that he is constantly giving to me, and that I give nothing back.
Thing is, I DO want and appreciate him. I love him. I'm so glad we found each other, at this relatively late stage in life (I'm 40, he's 50). But I find the weekdays hard, when DD is playing up and I'm exhausted from work and the constant bloody grind of housework and organising everything. As consequence, sex tends to happen at the weekends. I'd say we probably have sex a couple of times at the weekend, and sometimes, but not always, once during the week.
The funny thing is, that at the weekends when I'm relaxed and can focus on us rather than everybody else, I do dress up for him, and am happy to do so. I really enjoy it, and love the effect it has on him. This morning, during yet another argument about this, I reminded him of this, but he said it doesn't count because I'm only doing it under duress. I'm not doing it under duress, but it seems I can't win. He is insistant that I should - on say, a Tuesday evening, when I've been at work, then come home and have been running around doing domestic chores and coping with / helping / monitoring / disciplining DD til 9.30pm, I should pop on some saucy underwear and adopt the sex kitten persona. But I don't want anyone to make anymore demands on mme. It's all I can do to crawl into bed and read for half an hour.
In the interests of balance, I should add that DH has more money than me and props me up a bit financially, which I'm incredibly grateful for and regularly tell him so. He does most of the washing up, hoovers the house once a week, cleans the bathrooms, does any gardening, and helps me with DD a lot. I have quite high standards domestically (but not ridiculous - I only clean once a week and change beds every 7 - 10 days), and am very tidy. Being tidy helps me feel on top of things, and I make no apology for it. DH says that he likes my standards, but doesn't really help to maintain them. I feel that I tidy up after him a lot.
An example: He eats a lot of biscuits. I have asked him to use a plate for these, as otherwise I have to clear up his crumbs. He refuses; thinks I'm being ridiculous. I got a telling off a couple of weeks ago for asking his DD to eat off a plate too. I've tried to explain to him that this little thing could actually help with the sex thing - I wouldn't feel so resentful having to clear up after him all the time. But it is just dismissed. He actually said to me this morning (and I quote) " we should have high standards domestically, and high standards in the bedroom" 
Your goign to tell me to LTB aren't you? 