Jax is your boyfriend and he likes to prank/flirt with you alot, then one day you guys had an argument because you saw him hug a girl that you didn't know. So you accused him of cheating, while you didn't know that the girl was jax's cousin.

(Btw this is an au where you aren't stuck in the circus)

"Look, will you listen to me for once?! That girl was my cousin, and you won't even believe me!?" Jax said in an annoyed tone.