John, I joined about the same time as you and the married WRAF scenario was certainly OK. At the same time, pregnancy = P45.
I married the current Mrs CGB in Summer 1994. At the time I was a flt lt and she was a Sgt. There was a significant amount of murmuring from my line-management but her side was fully supportive. However, a few conversations with Innsworth clearly indicated that life was going to be difficult. We would never serve together on the same station and, if we wanted a quarter, it would be at a third unrelated unit.
Anyway, Mrs CGB chose to leave the RAF on marriage and never looked back. Their loss, massively; she has achieved far more in the intervening 24 years than I have, in or out of the service.
PS. I remember chatting with a WRAF legal wg cdr in the mid-90s who had been representing the RAF in cases where various women had challenged the pregnancy rule having lost potential earnings. She told me that the standard opening line in claims was that the discharged individual would have reached the maximum rank attainable within their specialisation which, as officers, was never lower than one-star.