Nobody is going to post directions and recommendations on how to violate AMEX MR terms and conditions here.
https://www.americanexpress.com/us/r...rewards/terms/
Points are not your property. You can't transfer points to any other person or program account.
This sort of stuff of trying to do end runs around program terms and conditions and discussing that is specifically discouraged on FlyerTalk. If you really must find out about that route feel free to fire up your browser search engine. Remember, caveat emptor, and your parents could lose their AMEX MR balance and cards, but you're all adults and can make your own decisions on that.
Your options that are within program terms are using the CS Platinum at 1.25 cpp and the Morgan Stanley Platinum at 1 cpp. Also, AMEX gift cards are a way to monetize a point balance within program terms.