My mother passed away when I was a few months old so I never got to know her. I didn't have any known family until late last year when I got into contact with an older half sister that I found via an online ancestry/DNA test. The guy I thought was my father wasn't, but instead was a much older man that left a large number of siblings in his wake. My older sister, and another sister, had been determined to try and find any kids he left behind because he was not a nice man. I took the test on the off chance I could find anyone to spend holidays with. I was hoping for a distant cousin, anything, because I have honestly been very lonely for a very long time. Since we made contact, she's become more or less the only maternal figure I've ever had. She's like one of those sitcom moms that cooks dinner and reads to her kids. It was a lot for me at first but she basically took me in as another one of her kids. She was very upfront with me being able to discuss anything with her, she was careful to help me feel at ease (I have a lot of anxiety and get nervous easily). I was a stranger and within a week, she was like my mother. For the first time in my life, I had pancakes that were made from scratch and she had more or less moved me in with her. She didn't ask any questions, really. She just welcomed me in like I had always been her sister, or one of her kids.
A while back, some intimate videos of her and her husband made the rounds on the internet and I happened upon one. I was shocked at first because she doesn't strike anyone as the type that would be involved in making a video of that type. She has particular features that make it impossible to confuse her with anyone and it took me completely by surprise. I was convinced that she wouldn't have put this up on her own, nor do I think her husband would. They are very private people and are very far removed from the type that seemed "open" about such things. I asked her about it and while she turned completely red faced, she explained that she had made every effort to get them all taken down but they pop up from time to time (it was part of a larger revenge porn scheme that I don't feel is my right to share) and she would answer any questions that I had. For some reason, my brain flipped to "go" mode and I asked her everything I never had the nerve to ask anyone. Everything from how to go on a date, to how to even approach a potential partner, and then finally onto the more detailed aspects of sex. She answered in detail everything she had learned in her life. She then gave me the talk about not doing something unless I felt ready to do it, even if it's in the realm of BDSM because that was the theming to the leaked video I found.
I felt better at the end of the talk, my sister was even more red-faced, and I was also wondering if kink inclinations were genetic somehow. She even introduced me to a few of her friends that are into the same things and I met a nice guy that I've been able to speak to for a bit now.
While it's not really a "mom" that I talked to, it was the closest I have ever had. I think it was far more awkward for her than it was for me, most likely because she looks like a suburban mom complete with a van and color-coordinated dinnerware for her kids. She raised her younger brother (same mother while she and I share a father and he's actually a year younger than I am) from the time she was a teenager as well and explained she had already given "the talk" before so the shock had worn off a good bit. She also commented it was good practice for when her kids got old enough.