Here’s the rule: Whenever we use a pronoun ending in -self or -selves, that form must point back (reflect) to a noun or pronoun near the beginning of the sentence. For example, Herb poured himself a drink. (Himself is correct because we know it refers to or reflects the subject, Herb.) I doubt that anyone would write this sentence: I poured a drink for Maggie and himself.
Because I’m a careful, professional writer,
I remain aware of reflexive pronouns.