I advise against using proof you need to support the other spouse in their own country as evidence of relationship during the application process, a few pictures and travel docs or smth is enough for the NVC, they just care about categories of filing being legit, finances and such. Until you are Documentarily Approved and scheduled for interview you want to submit info which shows financial stability, now that being said, it wouldn't hurt to bring this wire transfer receipt to the interview after your finances already got approved and you've moved on to the stage of showing bona-fide relationship at the visa interview