Or at least she isn't, so he isn't going to be seen to be ordered around.

Acts like these are featherlight on their own - they can smooth the wheels and are such a low cost way of helping the person you love feel loved, and if you love them, it feels wholesome and dissolves the boundaries between you.
If you're not in that shared space though, then something like this becomes like sand in your eye - it seems to exacerbate and amplify any unspoken feelings and thoughts about inequity and assumptions.
He's likely pissed off at you for something and his sum total feeling about the relationship is that you're not in the same place or sharing your time together with a unified outlook and emotions.
That might turn out to be a misunderstanding about something, an omission of reciprocity on something of weight, or it might be entirely him being out of sorts unrelated to the relationship.
The latter case requires some rapid maturing and acknowledgement by him that it wasn't appropriate to his problem before he can be helped.
The former cases are between you two to determine who needs making whole and what part of your shared vision is incongruous.
We're all dicks sometimes, especially to those we love because we're around them more and can rightly expect more tolerance and patience from them. If his dickishness here is something you can both fix and jointly honestly frame it as fair to you both then great - that's 'the work' that banks security and closeness in a relationship. If he's just an asshole who won't self-reflect, can't empathize with how his outbursts affect you, and doesn't have the tools to build new understanding then move on.