Let's say I am labeling a picture of me, my wife and my stepson, but the picture is of an occasion before we got married. Is it misleading to label the picture: "me, my wife and my stepson" which is true now, but was not true at the time the picture was taken? Edit: Let's say in the context of a picture album that subsequently included our wedding pictures?
It's not quite wrong to label it that way, but it might be best to add a clarification:
me, my wife and my stepson, before the marriage
Another option is to say:
me and my now wife and stepson
(with the extra "and" added so the one "now" applies to both wife and stepson). See the Wiktionary entry, particularly the 1908 example under "quotations" for adjective meaning 1.