estava traindo

was cheating on

→ estar
phrase Rare #42,879
was cheating on Usually refers to being unfaithful to a romantic partner.
PO: Ela descobriu que ele estava traindo.
EN: She found out he was cheating.

Mary foi a última a saber que Tom a estava traindo.

Mary was the last to find out that Tom was cheating on her.

Tom estava traindo sua mulher.

Tom was cheating on his wife.

Sami sabia que a Layla o estava traindo.

Sami knew that Layla was cheating on him.

Vera olhou para Sergey porque ele estava traindo a esposa dele.

Vera glared at Sergey because he was cheating on his wife.