@Jazzjazzjazz so all it would take to break up your marriage is someone trying it on with you, and your partner naturally reacting to that and messaging the person. Likely you’re the kind of person who wouldn’t even tell your partner it had happened anyway, like so many are
Yes, that’s ‘all’ it would take. My DH has never infantilised me, or deemed me incompetent, and trusts me. Those things ARE critical to me so if those were breached that would be the end. I don’t believe it’s any sort of natural reaction to message someone in the context you put forward, I believe someone would only do that if they felt they had to take control of the situation deeming me incompetent. I don’t see myself as incompetent, quite the opposite. If DH saw me as incompetent, I’d turf him in a nanosecond. Similarly, why would I be with a DH who I deemed incompetent and/or untrustworthy! If I thought he was either of those things, which is the only reason I’d step in and message someone, then I wouldn’t want to be with him anyway and they could happily have him!
As for your assessment that I’m the kind of person who would never tell DH if someone propositioned me, you are wrong and right. If it’s someone DH doesn’t know, has never met, and I can’t see them ever meeting, then I wouldn’t tell him. Not because I’m hiding anything, not because I’m interested, not because I may want to in the future. It’s because it would just be too tedious with no output. ‘Hi DH, Dave from nephrology hit on me today, I told him he’s having a laugh and sent him packing’. In return I’ll get ‘What’s nephrology’. Cue 10mins of my life I’ll never get back explaining what it is and answering questions about nephrology. He won’t care about Dave. However, if it’s anyone we know in common then I’ll tell him as there is a point as we can have a giggle about them at the time and also whenever we see them we can joke with each other about it. ‘Look, there’s roaring Roger at the dips, if you go now you can make his day and give him a grope’, and we have a giggle at Roger’s expense, why not.