The accused Claremont serial killer’s first wife has given evidence at the WA Supreme Court trial.

The woman, who can’t been named, is being questioned by the state prosecution about Bradley Robert Edwards’ living arrangements, the cars he drove, their marriage and their relationship breakdown.

The pair married in 1991, the woman has told the court their relationship deteriorated between 1994 and 95. She had an affair with another man and fell pregnant in 1996.

The prosecution has previously linked Mr Edwards’ relationship breakdowns with the murders of three woman in the mid-1990s, to which he has pleaded not guilty.

WAtoday’s Heather McNeill spoke to Oliver Peterson.

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