I was looking for more Brutasha stuff when I came across Avengers Assemble, There are 4 episodes in particular (Season 1 Ep 11: Hulked out heroes, Season 3 Ep 10: The Inhuman Condition, Season 3 Ep 14: Seeing Double and season 3 Ep 20: U-foes (The latest episode upon posting))
In SEEING DOUBLE Natasha and The Hulk go on what could only be considered a date at the beginning of the ep and at the end of the episode it is Natasha that is able to stop hulk from being the Winter Hulk in a scene reminiscent of the lullaby scene in Age of Ultron,
In THE INHUMAN CONDITION Both Natasha and Hulk believe that they are something they never asked to become like Bruce with the hulk and Natasha with the Black Widow much like the inhumans that go through teragenesis without knowing they were inhumans to begin with, There are also countless scenes where they are saving each other this episode also contains the Fist Bump.
I highly recommend these four episodes for any brutasha/Hulkwidow shipper
I also truly believe that the writers of Avengers assemble may be hinting at a Natasha Hulk relationship which could be a great way to help kids that are too young for the films to accept the pairing for when they finally get to watch the films.