。
She's drinking coffee right now.
Literal
She [topic-は] now coffee [object-を] is-drinking.
コーヒーを飲む is the standard collocation for 'drink coffee,' with 飲む as the all-purpose verb for drinking liquids. Coffee culture in Japan runs deep — from the 喫茶店 (kissaten, traditional café) tradition founded in the early 20th century to modern third-wave specialty shops in places like Kiyosumi-Shirakawa. Most Japanese homes also keep an electric coffee maker. The polite ~ています form keeps the register neutral and friendly.