Hearing Alice's explanation, Weiss presumed, "So you think I'd forget about you and find another woman?"
In response, Alice shook her head, "No, I'm just worried that you won't be able to keep your memories if you die and transmigrate or reincarnate again."
"I know how much you love me so I don't doubt your loyalty. But if those higher existences were to deal with you without my awareness, then you might lose your memories of me if you ever die."
"You are at a high risk of death after becoming one of the transmigrators tasked to prevent the end of the world. If you ever die, I'm not certain if you can keep your memories in the next reincarnation or transmigration."
Alice continued, "If you can't even keep your memories, then you are bound to forget about me and I can't even blame you for that."