I regularly have sex with my mom

So I've been regularly having sex with my mother for almost a year now. She is 53 and I am 25. She has since been divorced from her second husband about 2 years ago, has been dating on and off until last July, she told me she had taken a break from looking. About a month later, "it" happened. I got home one night late july last year, and we were watching movies together on the couch as we do often (at the time I still lived with her, have since moved into an apartment and she spends the night a few times a week) we just started to cuddle a bit, and then we kissed on the cheek, the lips, and then it escalated into sex. We are no strangers to physical contact to one another, even into adulthood we still hug and even cuddle pretty often, so it almost came naturally. It was very strange at first, but we talked it out and we both enjoyed it, so it became a regular thing. And to be honest, I'm very glad that it has. I have always been very close to my mom, and at 53 she is very fit and smooth, she is a very beautiful woman and she is so passionate. I've honestly never felt an experience more erotic and more passionate than making love to her, it's like a closeness I can't really explain but it feels so wonderful. I wouldn't say it's like a "boyfriend/girlfriend" or "husband and wife" feeling, but something different yet just as strong, though still very much a family like bond, there is this casual playfulness to the sex itself. (And just to let you know I have had a few girlfriends/boyfriends throughout high school and adulthood, so I'm not doing this out of desperation, I'm not being "manipulated" by anyone, I want to make that perfectly clear) This is something that I very much enjoy, it's been the most erotic and exciting thing both of us have ever experienced in the bedroom. However, there has been someone who has been interested in me and I've been considering as well. I feel like we have a lot in common and I wanna see if it goes anywhere, I've told my mom about her and she is ok with it, my mother and I have discussed a long time ago that the relationship we have at its core is still family, just a "with benefits" sort of thing. I feel like if I ever did have a long term relationship with that girl, or anyone, the whole "I have a sexual relationship with my mom" thing mite creep them out. I have this fear now that they mite find out if I go any further with them, but I know I have to be truthful with them. I know I'm thinking way to ahead of myself, but I really hope that this won't end up tainting any potential relationships I mite have in the future. I'm sure there are a few woman out there who would be accepting of this unusual relationship I have with my mom, but no doubt they are few and far between. I'm kind of conflicted on what to do right now, the logical thing would be to just keep it a secret and that's what we've been doing, but there is always that tick in the back of my mind that any girl/guy I mite want to date will somehow find out.

just... any advice?

and a few answers to questions I'm most likely going to get,
I'm bisexual
We don't use protection (don't need to)
I am an only child
we are 100% biologically related
my real dad dosen't know (haven't talked to him since I was 17, I won't go into detail but it's better that he's out of both of our lives)
at the time of me writing this we are still sexually active with eachother