It’s both. You have an androgen overload in your system presently, levels are still constantly building (so you can’t accommodate to the new high norm because it hasn’t had any time at stable blood levels), and Tren in particular hits the amygdala, pushing you to more drastic action over thought. Test makes people horny, and Tren much more so.
Generally you hear guys who report a rise in sexual deviance on it - you’re much more insatiable, so you end up seeking progressively more exotic fantasies to try to fulfill that fire. Cabergoline also really pushes this all, hard. If you watch porn, you’re going to find yourself looking at all kinds of things you might have not been intrigued by. In general, your interest in women in real life will greatly increase, and your standards will lower (possibly considerably, because novelty is also an important component of the dopamine high you’re seeking).
I’m going to sell it to you straight: you want to run big boy gear, you have to deal with big boy sides. THAT is your choice, not your wife who hasn’t done anything but be a good companion to you & mother to your children. If you guys believe you needed to work on intimacy before this, I totally support that. But understand that if she increases her bedroom time with you 100%…that’s still twice a week. And you can jerk off twice a day right now and will still be able to get hard if the wind blows in your direction, and would bang a 3/10 behind a dumpster in a heartbeat if there were zero repercussions. So there’s going to be a deficit you have to beat off on your own, plain and simple.
And also, if you guys weren’t doing all kinds of kinky stuff when you met, it’s not reasonable to assume she’s suddenly going to be down for anal while you choke her out or spray whipped cream all over during a threesome or whatever. I’m being a little extravagant for contrast - the point is, you OWE her your faithfulness because she gives that to you. You should tell her if you want to explore/try some things, but tread lightly and respect her if she’s not willing to go as far.
Especially when she doesn’t even understand you’re on Tren and this is a temporary thing. My wife understands I have more interest when on blast, and puts up with more of my bitchiness too, near a contest. And she tries to accommodate, but we still have kids with busy lives so I’m still on my own most of the time, and she will only take so much crap if I’m being an asshole (rightly so!).