His sister probably cleans more than she builds lego... both are valid (ish) but if you define yourself as a SAHM then you are a mum. Not a SAHDG (domestic goddess) the rules are different.
Most SAHMs I know think a personal treat is a cup of coffee without children in a supermarket, or a charity shop 'find'. A SADG has a lovely chic clean house at all times, and prefers tiffany to tinker.
Tell your DH, if he thinks he's 'paying all and getting nothing' that a SADG costs considerably MORE!!!
I DO sympathise with those who work whilst their partner SAH. I sympathise because the roles have very different challenges and remits, and I've been both. When I SAH I constantly felt inferior on the social circuit, when it came to money I felt I was having to go 'cap in hand' for stuff I usually bought with my wages, and felt constantly knackered. When I worked I felt I had little for me, felt the burden of paying the bills, and felt constantly knackered.
I think when you both acknowledge the validity of the 'downsides' of each role, and can agree not to put the other down to feel justified because comparison is wrong really, you may be able to JUST BEND DOWN and pick up a sweet wrapper when you see it, rather than using it to delve into deeper issues.
YANBU to put this thread your way. YABU to only see your PoV. Likewise your DH IBU for not considering what you actually do, day in day out, but is NBU for being knackered, blinkered and wondering why everything isn't just tickety boo compared to his sister's whenever he comes home... because he's not done it, because he sees his sister (who's probably lovely, I don't know, but I don't instinctively want to drop by for coffee) and because he only sees his own stresses and burdens.
I think that's hopefully fence sittery enough for both you and your DH. Ultimately though HeIBU and you're trying to prove a point you shouldn't have to make.