While I've overlooked some grammar issues regarding the MC/sister calling each other Brother/Sister or Bro/Sis, I can just gloss over it.
But while Claire is talking about the "first party" she went to, MC says:
"You went out with (Brother/Bro/[r3]) to get a new dress"
and "I know (Brother/Bro/[r3]) bought it for you"
Which Claire responds with "She did make me do extra chores though!"
Was this actually supposed to refer to (Mom/[r2])?
But while Claire is talking about the "first party" she went to, MC says:
"You went out with (Brother/Bro/[r3]) to get a new dress"
and "I know (Brother/Bro/[r3]) bought it for you"
Which Claire responds with "She did make me do extra chores though!"
Was this actually supposed to refer to (Mom/[r2])?