How to render a Step-mother speechless

So I was sitting next to my husband ready to watch the last high school home football game of the season. I had my scarf wrapped around my neck, my bulkiest sweater on, and a blanket next to me ready to use as the evening chill set in. I was turned toward my husband in deep conversation about, oh I don't know, who was going to make dinner, when I felt an arm circle around me and give me a little "Hey there" hug. I turned myself around and was greeted with a lovely grin from someone I know from church. She too just happens to be a step-mom and one of her step-sons is a great friend to mine. She said she wanted to tell me something about my step-son. My husband and I paused for a moment and anticipated what she was going to say. The pause continued longer than comfortable so I jokingly filled in the silence with "Uh, oh." The three of us giggled and she assured "No, No. I was just trying to remember how my son told me..." She went on to share that her son, earlier in the week, had commented how cool he thought it was that my step-son loved me so much. My jaw dropped and my husband elbowed me. I responded with a, "Really?" Almost with a disbelieving tone. The woman said "Yes" and that her son said "He talks about how great she is and that he loves having her around, and he use to never talk about his step-mom." My friend went on to say that her own step-son seemed to be in awe and ended his story with, "It's cool. It's like they're ... TIGHT!" And with that she was gone. All I could do was turn back to my husband who was grinning from ear-to-ear and triumphantly stated, "I told you so." I couldn't think of anything to say. Nothing. No words. I was surprised, humbled, happy, and felt a little triumphant as well. All I could think was that I will NEVER tell my step-son what happened (or at least not until he has a son of his own) for fear that he will think his secret has been discovered and take it away or even worse deny it. But for now, I'm still smiling on the inside.