Any number of reasons why she understands. My brother was born deaf, my parents found out when he was 2 months. Unfortunately, he was not a candidate for the implants (they wouldn't work), and at 67, he is OK with being deaf (NOT hearing impaired, he says). Back in the day, they did not teach sign.... he went to a school for the deaf...their reasoning was "you are going to be around hearing people, so you need to understand them". Now, I think they should have taught both sign and lip reading. His wife is also deaf ( from birth). Their wedding was a bit bizarre, deaf sitting on one side, hearing on the other. But what struck me at the time was, that in that moment, if you didn't know sign, the deagf guests would not, for the most part, try to communicate with you. Sad for me at the time, I wanted to get to know my brother's friends. It's OK now, but I have a hard time trying to red-pill my brother and SIL, they absolutely believe what MSM tell them, and believe that the government will take care of them. I send them a lot of threads from here, but don't know of they read them.
Any number of reasons why she understands. My brother was born deaf, my parents found out when he was 2 months. Unfortunately, he was not a candidate for the implants (they wouldn't work), and at 67, he is OK with being deaf (NOT hearing impaired, he says).