you'll still get silenced and your appeal won't work because this is your account. So it's your fault ?
It's against ToU to advertise them not name them. Then I'd be getting silenced for saying I LOVE GOOGLE CHROME or YAHOO MAIL SUCKS or even I SKYPE WITH MY MOM.
... I'm sure your sister used your account to announce she will provide photos of herself on a third party app via your account. Because clearly that's more logical than using her own, or better yet, not doing it at all.