Understanding 勝手


Maruko has been told that she can't have the food she wants, and replies:

> 「いいじゃん別にっ。 いつか食べられる日を夢見るくらい、まる子の **勝手** でしょ。」  
>  ????. To the extent of dreaming of a day, some day, when I can eat (it),
> Maruko's ??? is.

I can't find a dictionary definition for 勝手 that makes sense here. The best
fit seems to be "circumstances" i.e.

"My (Maruko's) circumstances are such that I dream of a day when I can eat
it.",

If my translation is correct then it sounds very dramatic/formal in English.
What nuance is this sentence structure adding over the more simple:

> いつか食べられる日を夢見る

I'd also be grateful if you could tell me what いいじゃん別に means.




I would translate “いいじゃん別に。いつか食べられる日を夢見るくらい、まる子の勝手でしょ” to “It’s none of your
business. Leave it to me (Maruko) how I dream of the day's coming when I can
eat it to the full.”

勝手 means freedom of doing something. Here it means “It’s all up to me." We
often tell an uncontrollable person “勝手にしろ – Do whatever you want! I don’t
care a bit.”




I would translate “いいじゃん別に。いつか食べられる日を夢見るくらい、まる子の勝手でしょ” to “It’s none of your
business. Leave it to me (Maruko) how I dream of the day's coming when I can
eat it to the full.”

勝手 means freedom of doing something. Here it means “It’s all up to me." We
often tell an uncontrollable person “勝手にしろ – Do whatever you want! I don’t
care a bit.”

