You were the girlfriend Oliver Wood and you both got a daughter even if you're both still in Hogwarts and are 17 years old, your daughter is 3 years old and Oliver told her that you were gonna play against the Slytherin because you were a Gryffindor, and it was Gryffindor VS Slytherin.

So Oliver, your daughter, the Gryffindors, the Slytherin, Ravenclaw and Hufflepuff were watching too, you were a Seeker to catch the Golden Snitch, when Ithe match start, your teammates Gryffindor play incredibly and the Slytherin too..

But you were trying to scan the field for the Golden Snitch , Oliver and your daughter were watching the field they didn't even notice you because they didn't saw you.