Prior to meeting my wife, I considered myself strictly a DL (Diaper Lover). It was like that for 15+ years. I never hid my special interest in diapers from her and decided to tell her all about it while we were still just friends.
She was and still is very open-minded, nonjudgmental, supportive and encouraging when it comes to my desire to wear and wet diapers. While dating, and for the first couple years after getting married, she wasn't an active participant, though she would occasionally playfully tease me about my diapers or discreetly pat my diapered butt. It was actually really nice, and I looked to her playful ribbing.
Then one day, seemingly out of the blue, she "suddenly" became more interested in my diaper wearing, which led to her encouraging me to wear diapers to bed every night. It was actually my wife who suggested that we delve into the AB (Adult Baby) side ofthings. She not only changes my diapers, but she's bought me onsies, a pacifier, baby bottles, and loves to nurse me too (we're currently working on getting her to lactate. Now whenever I wear diapers around her I'm no longer Dave. I'm "BabyDavey" and she's my Mommy.
You're right, having a loving, caring Mommy is absolutely a wonderful thing.