I've dated single moms and even lived with two of them. Just dating (and fucking) single moms is great and the sex is probably the best you will ever have. DO NOT LIVE WITH THEM and [[[DO NOT EVER EVER EVER MARRY ONE!!!]]]
Cohabiting with them is bad news.
1) The sex drops off at least 25% as soon as you move in together. After 6 months another 25% and after a year or so no sex at all or very infrequently.
2) You will always be the outsider. She and her children are a family and they will see you simply as the guy banging their mom.
3) She will expect you to pay for dinners, birthdays, Christmas presents, vacations, etc, for them even thought they aren't your kids. You will also be required to go to graduations, sporting events, band concerts, etc, even though they will always want pics with their mom and dad and not you.
4) In many states you could be required to pay support for her and them later especially if they don't already have a dad paying child support. In some states now simply cohabiting with a woman OR just dating her for years and going on vacation with her could force you to pay palimony.
It's best to just get the sex until she pressures you to move in or get married and then cut her loose. Make sure you don't get her pregnant.
x2
I've been playing the single moms game for years now, there aren't many options once you get older anyway. Since i have absolutely no interest in getting married or having kids, it's just fun to meet women and have great sex for a few months, then bail. If they are good enough to stick around longer that's fine, but i live a very independent lifestyle and women hate it with a passion. I am the most happy when i'm not dating someone, i just don't really need that attachment, but it's fun to date and enjoy the journey. I've found that single moms can be great lovers and handle relationships more seriously than others, but the emotional baggage is always there. If they have a brat kid i typically just walk at that point, i try not to meet their kid anyway but sometimes it gets to that point.
Earlier this year before the Covid nonsense started i was dating a single mom, she was pretty hot and very nice to me. She had a 3 year old and had been recently divorced, her ex was still in the picture to help with the child so i was thankful for that. We dated for about 3 months and she was a freak, she had no boundaries in bed and didn't expect me to play father, at first. I only met her daughter once. But after a while she started hinting at the "lets take my daughter here" or "vacation with my daughter". I just couldn't do it, i knew it was all downhill from there and i had zero interest in having a serious relationship with her because she was turning into an emotional train wreck. Serious ex-husband issues were surfacing, no thanks. It was hard to bail on her because if you removed the baggage from the child and ex, she was a 9 out of 10 for what i want in a women. We got along great and i don't think we ever argued about anything. She had a good job and took good care of me as a man, not just in bed but she was always willing to just help me with random things and chill. Didn't cause much drama and since we only saw each other on the weekends we never got tired of each other. But the kid and her emotional baggage with her ex was way too much for me to handle. I knew inside she wanted to be with her ex, but he had cheated on her and moved on to another chick. Oddly enough her sister is married to a guy i work with, that's how we met. The guy said she's dating her ex again. Glad i dodged that bullet.

The best sex you will ever have is with a recently divorced chick, but be prepared for a wild ride.