Conversation so far:
Who was Janet Gaynor romantically involved?
Gaynor was romantically involved with her friend and frequent co-star, Charles Farrell
How many times did Janet Gaynor marry?
3 times
Who did Janet Gaynor marry the first time?
Jesse Lydell Peck
Who did Janet Gaynor marry in 1939?
Adrian Adolph Greenburg

Question: Why was her marriage to him was called a lavender marriage?
Self-contained rewrite: Why was Janet Gaynor marriage to Gilbert Adrian was called a lavender marriage?