Reference for Ketubot 85:4

במקום אב קיימי מה התם מעשה ידיה לאב ה"נ מעשה ידיה לאחין או דלמא לא דמי לאב התם מדידיה מיתזנא הכא לאו מדידהו מיתזנא

Are they in place of her father and as in that case her handiwork belongs to her father so here also it belongs to her brothers; or are they not similar to the father, for in that case she is maintained out of his own estate but here she is not maintained out of their estate?

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