Help finding a manhwa

!! Please help me find a manhwa !!
It starts with (idk if the mc if male or female but it’s full color) the mc stuck in a tower with their siblings I remember two brothers (?) and a sickly younger little sister.
I think they were trapped because of some family issues happening and perhaps trapped by like an uncle(?).
I read up to the point where they are about to be released from the tower by some servant who would come to bring them things like food