Random townies marry my played sims

NennaRC​ Some mod you use must be doing this. There's no game function for it, and if this were a game bug you can be sure yours wouldn't be the only report. If you want some help narrowing down possible candidates, I'm happy to look at what you've got. Please see the last post in How to Use Mods and CC for how to generate a mod list file that you can paperclip to a reply here.

I don't use MCCC.

Well I don't. 

So you're saying that if you tick the heart in neighbourhood stories on the other sims/townies side, which says 'romance changes', this still doesn't allow townies from having any romance with my sims/played sims? The my sims side also has a heart which allows them to have romance changes, does this prevent them from having it with townies? Are you sure about that? What about the setting in game options/gameplay/allow romantic invites and requests. Does this ticked mean that townies can request relationship status changes on played sims? Some of these settings, either alone or in combination causes this to happen but I can't figure out which combinations so I have now unticked all which means that not even my played sims can have any autonomous romantic interactions. And why is it possible for my sims to get married to both played sims and townies simultaniously without a choice for me as player to prevent this?

NennaRC​  I will repeat, the game does not autonomously marry sims.  Marriage must be player initiated.  It does not happen in the background.  So, it has to be a mod doing it if you are getting sims that are married.  While you said you don't have a mod that marries sims, you didn't say you don't use mods.  I know of at least one mod, MCCC, that has options that, depending on your settings, will marry sims in the background as part of its story progression among other things.  There are probably others.  So, if you are using mods, check your settings or remove whatever mod is causing autonomous marriages to occur in your game.

Hope this helps.

Btw, I think this post should be moved to game issues where I initially posted it.

I don't have any mod which marries townies. I suppose the settings in neighbourhood stories and or in the game settings about allowing love interactions let them meet my played sims and then start romantic interactions with them so that eventually they get married or ask them to change relationship status. That's my guess as these settings allow that, I suppose. My played sims are still married to their played sim spouse, but they have obviously also married a townie, that is the issue. As I have move in/move out unticked in neighbourhood stories for my townies as I don't want them to populate my worlds, the now married townies have not been able to move in with their played sim spouses, but they still live in their townie household, not in world. Another thing I have unticked is automatic breakups. One way you can detect if your sims have a townie spouse is, for example, by checking which other sims your played sims have in their friends list. If there are any townies in their friends list, look through these townie's profiles. There you can see if they are married to your played sims as they will show up as spouses. Or, of course, if you happen to see any townies show affection to any of your played sims. I really don't want this to happen this way. I prefer no interference between random townies and my played sims so the settings we choose on either side (played sims and townies) work within that respective group only, but not across. I also don't understand why suddenly bigamy/polygamy is happening without a tickbox in settings for those who want to play that way, I don't. Currently, as I said I have now unticked romance changes, both in game settings and in neighbourhood stories for played sims and for townies as well as I don't know which setting is causing this. Before I had all of these ticked/highlighted. This prevents my played sims from having autonomous romantic interactions with other played sims to start a relationship. What I also did was to delete those townies who had married my played sims as that immediately removed them as their spouses, but I don't wish to have to go through townies regularly to delete those who might have married my sims. I play rotationally and don't play the same household all the time . I can't control if there are background interactions going on in not currently played households between townies and my sims. I would of course notice if anyting like that would happen in a household which I currently play, in most cases anyway unless a sim travels off lot. 

I guess that for those who want townies to interact with their sims and have relationships with them, this is fine, but not for all of us. I certainly don't want my sims to marry a number of townies as well as my played sims. There should be a way to prevent this and maybe there is.

NennaRC​ The game does not autonomously marry sims even through Neighborhood Stories.  So, you must have a mod doing that.  So, you'll need to figure out which one and either adjust the settings or remove the mod.