está teniendo una aventura

is having an affair

→ estar
phrase Rare #51,004
is having an affair A discreet way to say someone is having a romantic or sexual relationship outside their committed relationship.
SP: Creo que está teniendo una aventura con alguien del trabajo.
EN: I think he’s having an affair with someone from work.

Creo que está teniendo una aventura.

I think she's having an affair.

— Los excéntricos Tenenbaums (2001)

Él está teniendo una aventura con su secretaria.

He's having an affair with his secretary.

¡Ese chico está teniendo una aventura con tu hermana!

That guy is having an affair with your sister!

Michael está teniendo una aventura.

Michael is having an affair.

— Locamente millonarios (2018)