I'm not sure why she is painting a picture that motherhood means you are confined to the house every day and your husband needs to make you a packed lunch.
Baby isn't a tiny newborn anymore, she can't still claim to be in the bubble. As lovely as it is, that ain't reality. You carry on as a mother because you have to. If baby cries whilst you make yourself a sandwich and a drink then so be it, you have to eat to function and baby will be fine. She is giving a perception that he always has to be carried or held and she cannot do anything for herself. It's completely untrue to paint that sort of picture. There is absolutely no need for her to be getting her husband to make her a packed lunch ffs. She is recovered from her section and baby is healthy, she can move and make her own food!
He is 11 or 12 weeks now, she needs to be getting out and about as being cooped up inside really isn't doing her any good.
Get him to a baby group, baby sensory or massage, make some mum friends. Take him for a swim once a week! She was whining the other day that she hadn't managed to go to Costa and really wanted to, I just don't get why she can't do that?! Go for a walk and get a Costa, ffs he is a baby and he will adapt to your routine.