Coleraine woman, Hazel Stewart will not give evidence at her trial.
The mother of two denies murdering her husband, Trevor Buchanan and her former lover’s wife Lesley Howell back in 1991.
The jury was told on Thursday that closing submissions would be heard next week after which they could expect to retire to consider their verdict.
Her former lover, Colin Howell is serving a 21-year sentence after he admitted his guilt last year.
Police originally thought Mr Buchanan and Mrs Howell died in a suicide pact.