She was jointly accused with her husband, Frederick, who faces 10 murder charges, of murdering Therese Siegenthaler, 21, a Swiss student who disappeared in Lewisham, south-east London, in April 1974.
The new charge - which brings to four the number of alleged murders in which Mrs West, 40, is jointly accused with her husband - was put when she made a three-minute appearance before Gloucester magistrates.
She was again remanded to police cells to appear before the same court on Friday. There was no application for bail and reporting restrictions were not lifted.
Therese Siegenthaler's body was the fourth to be unearthed at 25 Cromwell Street, Gloucester. She lived in London and was travelling to Ireland for Easter in 1974 when she disappeared.
Mrs West is also accused of taking part - with two men - in the rape of a teenage girl and with assaulting a seven-year-old boy, causing him actual bodily harm.
Police yesterday resumed digs in Fingerpost Field at Kempley, Gloucestershire, and at the Wests' former home at 25 Midland Road, Gloucester.Reuse content