It was probably my fist spanking as a sissy baby. My wife, who knew about my AB side for years, caught me looking at sissy onsie/skirt outfits on amazon. She asked what I was looking at those for. I told her I was just looking. She kept being persistent about it and I finally admitted that I had always wondered what it felt like to be wearing a skirt and have it flipped up and my diapers pulled down for a spanking, like a naughty toddler girl. She said she knew I was potty pants diaper boy, but had no idea I was a sissy baby too. She told me I could buy it, but if I did, she would show me what happens to naughty sissy baby girls. (With a wink) So I bought it. When it came in she took it and told me she was going to pick a day for it. That day came a week later. She pulled me into my changing room (spare bedroom) and pinned me in double cloth diapers and a pair of PEVA rubber pants. Then she handed me the outfit, a pink frilly diaper cover, and a pair of mary jane shoes in my size she had bought and told me to put them on, then left the room. I put the onsie on, the diaper cover over the onsie, the skirt over that, and then the shoes. It was like a pink sailor suit with pink frillies underneath. I left the room and she saw me and started laughing at me. She said I looked so cute and pathetic. She then pulled out my paddle and told me that since I was a sissy baby, it was high time for me to be spanked like one. She grabbed the "spanking" chair and pulled it into the middle of the living room. I was always spanked in the bedroom so this was new. She sat down and called me over. I shuffled over slowly and when I was within arms reach she pulled me to her right side and started pulling my frilly diaper cover down. She then undid the onsie and pulled my rubber pants down as well. As she went to pull me over her knees, I hesitated. I'll never forget what she said "You wanted this! Your the one who is a sissy baby girl! Do you know how ridiculous that sounds? Supposed to be a big, strong man and now look at you. I was perfectly good with the AB thing. It was cute and kinda fun, but a sissy baby? I'm not sure how I feel about this yet. All I know is that you're dressed like a little girl who still wears diapers, and all I want to do is thoroughly spank that sissy little bottom of yours. Now get over my lap before you really make me mad." It was at this point that I knew this was different. She'd scolded me before during spankings, but this was different. She seemed actually mad. So I let her guide me over her lap. She then unpinned my diapers and pulled them back between my legs, exposing my bottom. She then told me to give her my right arm. I did and she held it tight to the small of my back. I was stuck now and a little afraid. She'd only ever done that when she gave me a legit real spanking when I got drunk one night. As she picked up the paddle I looked back and didn't see any smile or smirk on her face. She was straight lipped and her face was full of determination. I had little time to ponder this when very quickly she started spanking me. Holy crap! She started hard and fast and didn't let up for what seemed like an hour! It was only 10-15 I found out, but she'd never kept that pace up for that long. As for me, I was kicking and and sobbing after 2-3 minutes. The next 5-10 after that was incoherent crying and pleading, and the last several minutes I was totally defeated and just laid there wailing as my sissy bottom was paddled soundly. I didn't even know she had stopped spanking me when she got me up and walked me to the corner in the living room. I did the spanking dance the whole way. She tucked the back of my skirt and onsie into the hem of my skirt so my red, swollen bottom was on display. I stayed there till she came over and got me. No idea how long. She then had me lie down and she repinned my diapers and stood me up. She the pulled up my rubber pants, buttoned my onsie, and pulled up my frillies. She told me I was going to stay like this the rest of the day. She changed me around 4pm (I was soaked) into one of my Pampers sets. ( An ABDL diaper with a doubler) My bottom was still sore and very red. The sting had lasted for almost 2 hours!
After dinner she told me she accepts me as a sissy baby, but it was just confusing to her. She didn't know where she would fit in with it. She said she found out though. She said if I ever wanted to be a sissy baby girl again, it was good, but that while I was a sissy baby, she was going to be a disciplinarian. She said sissies need to be well spanked and I would be no exception. From then till now, anytime I want to be a sissy baby girl, I know I'm in for a hard spanking.
BTW, I found out why she spanked me in the living room. She had video taped the whole thing on her phone. I didn't know this for several years till she showed it to her friend (who knows about my AB, and now my sissy side) one night. Her friend laughed at me and said she wanted to see me dressed as a sissy baby. My wife made me dress up in my sissy baby outfit with the diapers. I was then given a maintenance spanking in front of her friend since the deal was anytime I was dressed as a sissy baby, I got a spankin. Wierd part was, as I was being spanked, I looked up at her friend, who was enjoying the show, looked back down and actually felt "right", like this was how I'm supposed to be.