Okay so I have a friend with something like this.
They will only eat frozen food and takeaway. Basically chip type stuff.
It is an anxiety thing, she has real difficulties with textures, and as a result has a very restricted diet. With a takeaway providing you go for something basic then you know exactly what you are getting, same with a ready meal. Homemade food varies so much, she has no control and this panics her - its sort of fear of the unknown and fear and embarrassment of their own reaction if it's food they can't cope with.
My friend used to go round people's houses and they would cook for her, she would force the food down to the point of vommiting and this has created huge anxietys for them around people's cooking. At least with a takeaway or ready meal you aren't offending someone so much when you don't eat it as well.
This is something my friend is quite embarrassed about, not something she would share easily, a massive part of the anxiety is the embarrassment around her restrictive diet. A little empathy goes a long way, a ready meal isn't really any effort and realistically a 2.50 ready meal is roughly what a portion of homemade food would cost. I think some people on this thread are coming across really poorly
It doesn't take much to imagine why someone might have these restrictions, anxieties aren't rational. Especially if someone is embarrassed about their anxiety/food issues providing something they can eat just helps make it seem a bit less 'odd' (which is how my friend feels) help them feel a bit less embarrassed.
I obviously don't know if this woman has similar anxieties to my friend. But for the sake of a ready meal I would just suck it up. Message your friend and ask what sort of ready meal they would eat and go from there.