It would be one thing if....He's going to eventually make all the chars customizable(probably even more than just basic clothes too)
So...yeah.
He introduced new outfits when he creates a new scene and then picked one scene and location for each character where you could pick and change the clothes she wears everyday....
Mom at night visir, Sis in her room....
But I think he now has two places to do this in the game for Mom when it really wasn't needed so just do it at her night visit and leave it there.
The only thing the outfits seem to be useful for is draining your money as you have to buy them.
And that's fine too but really the issue is the plot hasn't advanced much (now that dad is here maybe it will) and time has been spent on all these clothes changes.