Most likely, they meant that there was a period of time when they did not think about their abuse. But not thinking about something is not the same thing as being unable to remember it.
他们很可能是想说有一段时间他们不去想受虐的经历。但不去想某些事和不能记住某些事是不同的。正是记忆障碍造成了失忆症。