When you sign up, even for the innocent sounding 3 day trial, there is a small box w a checkmark in it. It is easy to miss, and that is by design. If you do not uncheck the box, you're automatically signed up for a 2nd site.
Then when you cancel your trial w Milfaholic, you instead get cancelled from the 2nd service you didn't even know you agreed to (by not unchecking the box). You will then be billed 29.95 monthly for Milfaholic, appearing as something like Epoch.com on your statement.