Maybe she didn't like how it affected MOS. IMO, if a female believes you (as her spouse, mate, whatever) are being negatively drawn into something without clear benefit, then she's going to want to put a stop to it. She doesn't want you to be destroyed, under any circumstances, much less by your own energy.
I'll say this, though: MOS has made me stop and trip hard in my mind more than once. I love it when that happens and IME life doesn't provide nearly enough of those moments. It'll only get worse as communication is reduced to very short one-way (usually meaningless) exclamations, in an "I like!" and "I don't like!" stupefaction.
We're becoming dumb, man. Tragically stupid, and not by our own inclination.
But give MOS time to work it out. If he's meant to come back for more rounds, then it'll happen.