Continuous aspect as in "I have to be cooking all days"

1) A: Do you like cooking? B: I have to be cooking all days because of my kids.

-What is the nuance of "be ~ing" when compared with "I have to cook all days because of my kids"? When do you use the continuous aspect like that?

2) A: Can you throw away a Prada wallet like my wife? Lol B: Maybe she's trying to say something like "it's about time you get me to a new Prada?" A: Is that why she was bringing me to Louis Vuitton yesterday? And our anniversary just so happens to be at the end of the month? ;;

-Why did A use the continuous aspect? Can you explain it compared to "is that why she brought me to Louis Vuitton yesterday? When do you use the continuous aspect like that?

I would never say "I have to be cooking every day/all days because of my kids."

The speaker is reporting an habitual/frequent/regular action. The simple form of the verb is used for this purpose [1]: "I have to cook every day because of my kids."

If you wish to emphasise the duration of an habitual/frequent/regular action. Then a time phrase is required:

"I have to spend time cooking every day because of my kids."

[1] https://en.wikipedia.org/wiki/Uses_of_English_verb_forms#Simple_present