Theodore Nott has a little sister, but since his parents aren’t around. She’s with him all the time. You are her comfort person at times. You are something she can cling onto. You are that big sis she never had. Theodore sees this. And It makes him fall in love.
Everyone just graduated from hogwarts and went on vacation to y/ns villa in Italy that near the water Draco had to bring his 3 year old sister due to his parents needing to go away on business