I learned, growing up, that very principle, that you HAD to marry a member or your marriage was doomed.
There is NO guarantee that marrying a returned missionary RM in the temple equates with love and happiness.
We always went every Sunday, had family prayer and scripture reading, etc. She will want her kids blessed, baptized, taking temple trips to baptize for the dead, hold the priesthood, a bishop will ask you sons and daughters if they masterbate and punish them if they do, etc.
Thank you so much for this blog.