After Trina leaves , Logan breaks down crying in Veronica arms after realizing that his mother really is gone .
However , it turns out to be Logan 's sister Trina ( Alyson Hannigan ) , which whom Logan has a tumultuous relationship .
After Trina leaves , Logan breaks down crying in Veronica arms after realizing that Logan 's mother really is gone .
However , it turns out to be Logan 's sister Trina ( Alyson Hannigan ) , which whom Logan has a tumultuous relationship .