Spanish star Penelope Cruz is set to shock fans by passionately kissing her own sister Monica, in a new music video.

The sisters play translators asked to interpret a lesbian porn film in the promo for their 22-year-old brother Eduardo Cruz's new single.

They pose suggestively with Eduardo, before succumbing to temptation and smooching with each other. (IG/WN/JC)

Watch the video below. Warning, may not be safe for work!