Apologies for the lack of tact upfront.

I'm going to point out that sexual exploration is something you should do together, as a team. If you feel the need to watch porn, you should talk about that need, and not do it in secret. You should also include her in your tastes and the evolution of your preference. If that's unacceptable for her, for one reason or another, you should explore alternatives together, again as a team.

The reasoning behind this, is that you want to avoid any major personal growth that is not known to your spouse, but strongly relates to her anyways. If you keep doing your own thing on your own time, you'll start growing apart, and will need to dail it back to her level and re-do a lot of soul searching to fix being apart on such a major topic.

My advice is to put a pin in it, and discuss what a healthy sex life means for the both of you once the twins have a proper routine and are less of an issue.

The difference is doing your own thing and erroding your marriage on your own terms, or trying to make it work out for both of you, together. I can't give you guarantees she will do the same in future, but you can lead by example at least.