"What about me? I told you everything about me, yet you couldn't tell me your name?" he asked in a low voice.
"I planned to. The day you brought Rias over to your house and shared your memories with me to tell me everything about yourself, including your powers and harem… I wanted to tell you about my name too.
But… according to you, you didn't know anyone by the name 'Elena' in your present time. I know who I was, but you didn't. I thought… I thought if I told you I am your best friend's mother… you would break up with me. And that was a valid reason to break up… by the way.
So I hid it from you, hoping you would realize it one day, eventually. And I know you did. I guess we were worried about the same reason and didn't want to accept the reality."
"Yeah…"
"And then I… I thought about it. What would happen if you suddenly went back to 2008? I was obviously scared of you leaving me behind, but that was something not in your or my hands.