This is true, courts always measure motive and balance the actions with how divergent it was from how a reasonable person would act.
There's plenty of reasonable reasons for her to have access. Especially if she had access to the account previously in a shared role and only read the information instead of modified it somehow. But that of course depends on whether the individual made it clear it was now off limits because (for example) it is now a strictly personal account again or the divorce was finalized and there was zero financial connection which exists between them.
Plus things like how reasonable it would be to not say anything about it but expecting them to know better. Which is why the exact details of the arrangement needs to be clear.
There's plenty of reasonable reasons for her to have access. Especially if she had access to the account previously in a shared role and only read the information instead of modified it somehow. But that of course depends on whether the individual made it clear it was now off limits because (for example) it is now a strictly personal account again or the divorce was finalized and there was zero financial connection which exists between them.
Plus things like how reasonable it would be to not say anything about it but expecting them to know better. Which is why the exact details of the arrangement needs to be clear.