Paid for porn sites

Hope someone can help me with this.
My wife has full access to all our bank accounts/savings etc. so I can't pay for access to porn sites like mysexylegs with credit/debit cards. I was hoping there was a way (a safe way) to pay through cash? Is there some way to pay cash into an anonymous account and then pay through that? Or some other way of doing it? I can't be the only wanker married man who can't pay through normal means.

Thanks for any help you can give me.