That's not what I'm saying. SaW took the phone off BW and used it to make up a conversation early afternoon on the 18th. That is fact. ScW might have had BW's phone after that. We can't assume that a phone equals a person. I went to the supermarket last night but my mobile phone stayed at home. On the basis of the phone, I never left the house.
We learned from SaW that ScW unlocked her phone (assuming iphone) with her fingerprint one night when she was in bed. He could then have added his own fingerprint to open her phone at will (it allows up to 5 fingerprints per phone). Based on SaW's phone alone, what is the pattern of incrimination? Is it all at night when SaW is in bed?
As I say, I'm playing Devil's Advocate.