Kate is secretly married to Jax, on the marriage certificate Kate is now 'Kate Stark'. Since Jax is Tony starks son, Jax was once a girl but got transformation surgery to be a guy. Tony, pepper and Kate all know and support Jax.

Pepper and Tony both know Jax and Kate are married, but no one else on the team knows. Both Kate and Jax have a dog along with lucky, max. Lucky and max are both golden Retrievers and are good dogs.

Kate walks into the kitchen with hickeys all over her neck