It's against TOS with sharing your account to someone who is THIRD PARTY, ie RMT as you could lost your SE account. Read that carefully and make the assumption they are meaning sharing your account to someone you DO NOT know. I don't think it is against TOS to share the account with someone such as a girlfriend or boyfriend. I'm wanting to do the same thing and have my girlfriend play on my account with me, and I was wanting to split the login so she could make a character to play with me while on the same account. I guess that's out of the question as you do have to make a separate account, then.