Yvette Del Agua was born in Gibraltar on 21 October 1957, daughter to Joseph and Lourdes Montegriffo.
For several years, she devoted herself entirely to their family, and only returned to work in 1983, when she was hired as a production secretary for the Gibraltar Broadcasting Corporation.
[2] Del Agua became spokesperson for the Voice of Gibraltar Group which was founded in 1996 by her husband Clive.
[4] During her long period as part of the GSD government, Del Agua was involved in several controversies.
Among other things, she was accused of lack of respect for the rights of disabled people,[5][6] lying about the numbers of the children's dental care program[7] and neglecting the working conditions of prison wardens as well as the escape of inmates in custody at HMP Moorish Castle.