While I have done it nicely many times when it is just a single date or pay for play kinda arrangements. But I would like to know the recommended nice ways to part ways when you are having a monthly arrangement but now got bored. As we have met many times in hotels, restaurants and kept in touch, I feel obliged to be nice I did say No Strings Attached, and being married helps with the excuse that I want to try to make it work with my wife again. But yet, I wanted to see what is the nice way to part ways, married or not

and if she calls or writes, to simply respond that you have decided to not meet with her again.  No reason should be offered as to why even if she insists on trying to get one out of you.

Or even a firm "weekly arrangement" but I suppose if I did any kind of bullshit excuse will work.

I would suggest one or two last meetings where you tell her that you are looking to end it (as others have said, no reason needed, but you have a built in excuse of the wife or you could go with "I just need to save more money for a while").  To me, it sounds like someone you respect and want to not do her too wrong, so it's most important, imo, to give her financial notice, thus telling her in advance of the last meeting or two that it's time for her to start looking.  If she gets pissed and doesn't want to see you that last time or two, problem solved anyway.  It should be obvious, but at this point, p2p is way to go for the last couple meets.  

Like GaG, I never get into any regular arrangement because I like to see a different SB every week if I can afford it. Sometimes I can only afford to see one a month, and I definitely do not want to see the same one every month. If I get tired of them and want to take a break, I just tell them my finance is very tight due to some necessary expenses which is true sometimes. I just had a new roof installed and had a major repair done on my car. It works like a charm when you tell them there won't be any sugar for quite a while.

Goodbye money. Goodbye girl.

If you say you're broke, but she still sees you on SA, she'll know you lied and will likely never see you again should you want to see her down the road.

I get your point, but if he just ghosts her, she isn't going to see him again anyway most likely.  

Case in point:   There is a gal I saw pretty hot and heavy when I first discovered the internet escort scene about 15 years ago.   We saw each other for 5-6 years, but for various reasons I stopped seeing her.

I will let her know that money is getting tight next time I see her and that she should have a backup plan as I may only see her on P2P basis and not be able to keep up with a monthly arrangement that takes care of her rent.  
I am not planning on renewing my premium on SA as I already have enough on my plate that I am still talking to and still some old P2P SBs that will see me in a heartbeat, plus I miss some of my providers, lol.
But thanks all, as now I have a bag full of excuses as well as reasons not to use an excuse

Saw her about 13 months every 3 weeks. She was about 90 minutes away. Her  
 complaining about life finally got to me tho the sex was great. I just told her I couldn't get out of town as I was having someone move in with me. She was cool about it. Haven't heard from her in about 3 months an she texts me she'll be in my town an if d like to get a drink. I happened to be in her town at the moment. Told her things didn't work out with the girl moving in an asked if she wanted to get a drink next time I'm in town. She said yes. Guess there could be more great sex on the way.