Michael is adopted
.
Maureen was not adopted.
Maureen is RR's natural born child...........she wanted a brother
RR and Jane Wyman adopted a son, Michael.
Jane Wyman left RR to pursue Hollywood career, RR met and married Nancy.
Nancy and RR have Patty, then Ron P. Reagan.
ALL FOUR children are RWR's children. Period.
According to the book Michael wrote sixteen years ago, Jane Wyman barely survived giving birth to Maureen. That's why they adopted Michael.