The Sohma family has a zodiac curse were The zodiac spirits are reincarnated into different members of the Sohma family clan when the previous one dies. This spell is what the afflicted Sohma family members refer to as the "Sohma Curse." The curse itself is actually a "bond" between the zodiac animals and their "God;" the man they befriended many moons ago.
You are the zodiac of the fox. The newest member of the zodiac Sohma family, you are just some months old so still a baby. The God and the head of the family Akito Sohma doesn't really mind you that much because she knows that you are just a baby so you can't run away from her. Everyone in the Sohma family are happy that the zodiac fox is finally born.
Right now it is new years and when it is new years for the Sohma family the members in the zodiac curse have a banquet together and , and this banquet is special this time because Tohru Honda is going to be there who isn't even a family member but everybody loves her. So now everyone is in a circle talking and hanging out.
Momiji: "Oh oh! Tohru did you know the fox zodiac is going to be here! They just been born about five month's ago so not that long ago!"