。
She made a hole in her kimono.
Literal
She [topic-は] kimono [in-に] hole [object-を] opened.
穴を空ける ('to make/open a hole') is the transitive expression — she caused the hole. 着物 ('kimono') is the general word for traditional Japanese clothing. に marks the location where the hole was made. Whether this was accidental or intentional is left ambiguous.