'COCAINE Cassie' Sainsbury, still languishing in a Colombian prison on cocaine trafficking charges, is expected to admit to acting as drug mule - based on the shock TV confessions of her fiance and family.

In startling admissions made to Seven's Sunday Night, the 22-year-old's partner Scott Broadbridge appears to have conceded his bride-to-be will confess to her part in a mystery international drugs syndicate - even before her case is brought before a Bogota court next month.

Broadbridge, who is understood to have been paid for his side of Sainsbury's "jail hell" story, sold his knowledge of her case to Seven, with her permission.

Accused drug mule.
Accused drug mule.

In Sunday Night's teaser, Broadbridge told reporter Denham Hitchcock his fiancee's flight to Colombia had been a surprise to him.

He is also expected to detail to the program what he knows of the alleged mystery man behind the cocaine deal, who Cassie has reportedly identified only as Angelo or Tom.

Cassie Sainsbury's fiance speaks: THE fiance of accused drug mule Cassie Sainsbury has broken his silence.