I don't know - I am not her. I do not know how she thinks. If she wasn't involved in the death she should have called the police asap I agree. Even if she was scared of him, at the point that he confessed to killing Becky, she must have known he would be going to prison and could not hurt her if she told all she knew. That does not necessarily make her guilty of conspiracy to kidnap and murder.
I look at it like this. I'm on the jury watching her. She stands in front of me on oath and says she never suspected Becky's body was in her house, never suspected NM was behaving strangely, was completely shocked that they were arrested and he had confessed to killing Becky.
I deem her to be lying. She has every opportunity now in court to say she found out in the days after Becky had died and said nothing to anyone because she either thought he would kill her or he was deranged or she would not be believed.
Now is her opportunity, she denies everything and anything. I am not going to believe she wasn't a part of the murder also. It is a circumstantial evidence case, they have some DNA evidence of SH on the face mask and the bin bags. So she wore gloves and NM did as much as he could on his own so that SH would not be tied to the killing and would be saved from prison for their children. They have none of SH's DNA at the murder scene but you don't need DNA evidence to convict for murder.
On 19th itself - a visit while AG was going to be out and on a day when they wouldn't normally go there, checking if Becky's going to be in even though a key was to be left out, to return a tin which entailed all 3 of them getting out of the car and going in the house, stopping en route to buy batteries for the stun gun or 'torch', loading the batteries into the stun gun immediately (NM didn't say he did it when he was in his hurry while SH was outside - his kit was ready, reversing up on the drive instead of parking in the road.
A demonstrated recent history of initiating talk of kidnap. Evidence of a shared jealousy and dislike of Becky with NM. Stun guns delivered in SH's name, unbelievable testimony of not knowing what it was even though NM said he bought them for them to have one each for protection. An unconvincing performance in police interviews, an unconvincing story of being outside for the duration of a long fight and struggle to the death, a killer who has difficulty pegging out the washing, and a demonstration of complete lack of human empathy.
I think there is sufficient for a jury to return a guilty verdict on SH being a party to the kidnap plan and involvement in the death of Becky.
Unless something happens after today to change my mind.