A former soldier accused of killing his grandmother lied when he told partners he had smothered the 84-year-old as a way of getting sympathy, Swansea Crown Court has heard.
Barry Rogers, on trial along with his mother Penelope John for the murder of 84-year-old Betty Guy, came under suspicion after one of the three ex-partners he told about being involved in the former nurse's death went to the police.
On Monday the 33-year-old said he initially thought his three former partners had colluded but later realised the details they knew meant he must have spoken to them about it.
He told jurors he did not remember the conversations.
'At times I think that yes, they have all been in contact but realistically no they haven't,' he added.
During cross-examination by Paul Lewis, for the prosecution, Rogers said 'sometimes I tell the truth' but admitted he told lies to get the result he wanted on occasions.
Mr Lewis said: 'The result you want in this case is for the jury to say you had nothing to with your grandmother's death isn't it?'
He said it was but insisted he had not lied to the jury.
Rogers, of Fishguard, Pembrokeshire, and his 50-year-old mother, of St Dogmaels, deny murder and the alternative charge of manslaughter.
The trial continues.