affair

AFFAIR noun

uk/əˈfeər/ us affair noun
(RELATIONSHIP)

B2 a sexual relationship between two people when one or both of them is married to someone else

роман, связь
He's been having an affair with a woman at work. be sb's affair
If something is your affair , it is private and you do not want anyone else to be involved or know about it.

быть чьим-либо личным делом
Смотрите такжеlove affair