have something going with
US /hæv ˈsʌmθɪŋ ˈɡoʊɪŋ wɪθ/
UK /hæv ˈsʌmθɪŋ ˈɡoʊɪŋ wɪθ/

1.
to have a romantic or sexual relationship with someone, often a secret one
:
•
I think John and Sarah have something going with each other.
•
She suspected her husband had something going with his secretary.
2.
to have a successful or promising venture or project underway
:
•
Our new startup really has something going with its innovative technology.
•
If we combine our efforts, we could really have something going with this project.