It is not snooping when your spouse has a history of cheating, as Heywyres does. Have you read the book "After The Affair", complete transparency is one of the steps to healing for the betrayed spouse when infidelity is brought into the picture...complete transparency is a requirement of the cheating spouse...providing stuff like this is standard for that when it comes to rebuilding the trust in the marriage.
Heywyre has a valid reason for him providing that particular months records...and he agreed to provide it, now he needs to stop backpedaling (because that sends up more red flags that he's trying to hide something) and provide it as he agreed to do.