You turn her against your brother

"I'm not in the mood right now...but maybe there's someone around here who would stand up to defend our family's name", you say, pointing to your brother. He gapes at you in disbelief "What game are you playing at, sis? Your friend is older and bigger, why don't you ask to your boyfriend to be your champion?". "Well it's obvious! He's too strong for her whereas you two are more even. She is bigger but you are a man, even if a young one. Furthermore, you are an amateur martial artist and a good fighter". Josh is still unconvinced. "Oh boy!", Laura says smirking, "Are you nervous? I won't hurt you, it's a friendly match after all!". Your brother is in a corner; he can't withdraw from the challenge and everybody's now encouraging him. He gets closer to your friend, resigned, while Liam joins you. The spotlight is on the two fighters, sharply in contrast: Josh is shorter than Laura and the black tank top that he's wearing makes him look even skinnier, whereas her opponent, taking off the pareo, shows everybody a curvy shape, slightly contained in a swim speedo. Josh takes off the shirt too, unfolding a net of small muscles. "Hardly a good display…", comments your friend, mocking him. He changes look hearing that and bend forward, ready to fight.