Your cousin should not have access to your account.

https://steamhost.cn/subscriber_agreement

C. Your Account (snipped)

You may not reveal, share or otherwise allow others to use your password or Account except as otherwise specifically authorized by Valve. You are responsible for the confidentiality of your login and password and for the security of your computer system. Valve is not responsible for the use of your password and Account or for all of the communication and activity on Steam that results from use of your login name and password by you, or by any person to whom you may have intentionally or by negligence disclosed your login and/or password in violation of this confidentiality provision.

oh no he just logged onto my computer.

Originally posted by scimitar:

oh no he just logged onto my computer.

And used your account or did you forget you wrote:

Originally posted by scimitar:

I asked my cousin to buy something on my account

yeah he went on my computer an used my account. Not really sure what this has to do with my question?

its really no different from letting someone playing on your desktop.

You agree to the Steam Subcriber Agreement when creating an account and it clearly states you cannot give access to your account to another.

ok that aside, do you have any idea why I can't change my location

Oh