From Blind Date To Brother Lover

About a year ago, after a long period of grief from ending a long marriage, I put myself out there again. First I got set up with friends of friends, I tried dating apps and sites but I'm not really into those things. I wasn't very successful, to be honest. But then, a couple months ago, a friend told me about a matchmaker for divorcés that actually did the work of sitting down, getting to know someone's character and expectations, and tried to set you up for blind dates. Her success rate was good, apparently.
Then the day arrives, I get all dolled up, ready to meet the sophisticated, mature but slightly younger gentleman I asked for, waited at the table the match maker had reserved at a restaurant... and in comes my younger brother (currently 47). We stood there in shock for an awkward few seconds but then burst out laughing at the coincidence. We took it with humor and sat down for an innocent brother and sister dinner to catch up. My brother had also gotten divorce a few years back and had trouble getting over it, so I was glad to watch him being so confident and gentlemanly.
But a thought started to come to me... the matchmaker was very thorough, and at least in my case, was very especific about what I wanted from a man, from character to appearance (and we both have a very common surname, and she doesn't tell the other who the person is, other than their first name and where they'll meet). Which meant to me that I'm attracted to men like my brother, and he's attracted to women like me. I didn't find that thought gross at all. It actually turned me on, and it showed... I started doing flirty things like play with my hair, put my chest forward... he noticed and we started a rather dangerous game. He asked things like if that was how I behaved on dates. We both reassured each other that we were doing ok. I swooned when he told me that I looked gorgeous and that any man would be extremely lucky to be in my position right now. And I started to remember a certain incident from our youth...
He paid the bill and took me home, as the gentleman he is. He walked me to my door and I just blurted out that incident:
"Do you remember that time when we were young, you saw me naked by accident and got rock hard immediately?"
He was in shock by the question, and before he could ask what was going on, I leaned in for the most passionate, intense kiss I've ever given a man. It felt so good and I could feel him getting rock hard between my legs. He didn't stop me, I opened the door and we stumbled into my appartment. We didn't even hesitate and he tore my dress off and started making love to me on the floor. It was a short but intense, passionate fuck. I lost count of how many times I came in what probably was only 5 minutes. He came inside me profusely. I still can get pregnant at my age but I didn't care (it was ok).
Afterwards he panicked a bit out of guilt, but I kissed him and reassured him: we're consenting adults, we're attracted to each other, and we love each other. The rest doesn't matter. We made love all night that night, with an energy we only ever had when we were young newlyweds. And we've been making love several times a week for a couple of months now. I haven't been to my appartment in ages, I spend most of my time in his.
I know it's been an impulsive decision unfitting to people our age, and we'll probably have a hard time keeping it a secret if it goes on longer. But not even my former husband made me feel the way my brother does, emotionally and sexually. Sometimes he couldn't even make me cum when we were married. I cum at least once with my brother. He makes me feel sexy, likes to watch me touch myself to orgasm, moans that he loves me into my ear as he fills me with cum. It's the sexiest, loveliest thing. It doesn't matter to me that he's my brother. I'd prefer to be his lover in secret for the rest of my days than find me another mediocre lover.