I spent Fat Tuesday with the F member of FAT. We had lunch at Duke’s (my second attempt to eat there), and enjoyed each other’s* company from a porch overlooking the Pacific. From this porch we saw several seagulls, pelicans, two surfers, and a seal!
*Possessive Forms: each other’s and one another’s. The possessive forms are each other’s and one another’s. The noun that follows is typically plural <each other’s cars> <they praised each other’s presentations>, but the more logical construction is singular <each other’s car> <they praised each other’s presentation>. Whether the phrase is each other’s or one another’s, it’s fairly common to see the apostrophe drift waywardly (and mistakenly) to the end of the phrase, perhaps because the idea of reciprocity gets overshadowed by the sense of plurality–e.g.:
“They can look back in time to see the field being planted, view the closeups of insect damage to the corn, or read one anothers’ [read one another’s] comments.” Laurent Belsie, “More Fun than Watching Paint Dry,” Christian Science Monitor, 26 July 2001, at 1.
Garner, Bryan (2009-07-28). Garner’s Modern American Usage (p. 287). Oxford University Press.