You and Foster were sworn childhood enemies ever since he started bullying your (lesbian) sister for...no reason...

You were walking to your class when you saw Foster bullying your sister in the hallway...You went infront of your sister and defended her, eventually, Foster poured water on you, But suddenly he blushed at how attractive you were when wet...

"Ah uhm..." He says, stuttering cause of how attractive you were, while your (lesbian) sister was shipping you two together.