£92 is an outrageous amount for a takeaway for two adults and four children. Me and DH have DD and her fiance around sometimes for a Chinese takeaway for 4 adults, and it only costs about 35 quid. What the bloody hell did you have?
Anyway, yeah, I think as a previous poster said, you should have said, 'well, I can't really afford a takeaway at the moment' and left the onus on her to say, 'well, I'll pay then.' If she'd suggested it, she should have paid IMO.
This puts me in mind of a while back, when somebody I know asked me and DH to go for a meal at their house. To thank my DH for fixing their computer for free ... We accepted. The day before we were due to go there, SHE texted me and said, 'I know, let's go to this certain restaurant for a meal instead...' And we were like, oh, really? Because like we thought we were coming to your house?' She said 'nah let's go to this restaurant...'
So then we met at the restaurant the next day, went in, and me and DH had two courses each, (came to £43 for the two,) and they had four courses each that came to £82! On the whole, bloody thing came to 125 pound.. SHE said (when the waiter came with the bill) 'just split it 50-50.' So me and DH ended up having to pay 60 odd pound each when we were only spent £43 AND we had been asked to somebody else's house. We were so pissed off, to be honest with you, I started giving them a wide berth after that. 'Lost touch' when we moved house.
To be honest, to ask somebody for a meal, and then get a takeaway, or go for a meal out, and then expect that person that you've asked to pay half is just horrible.