interfere in (someone's) relationship

Translations
вмешиваться в (чьи-то) отношения
He was always trying to interfere in his sister's relationship, which caused tension.
Он всегда пытался вмешиваться в отношения своей сестры, что вызывало напряжение.
Definitions
To become involved in or attempt to influence the romantic or personal relationship between two people, often in a way that is unwelcome or causes problems.
Words
interfere

verb
вмешиваться
in

preposition
в
someone

pronoun
чей то
is

functional word
есть
relationship

noun
отношения