Here's a cartoon sketch for English Users young and old.
It provides further use of apostrophe S for Possessive Case. It is from the new version of award-winning American children's television show THE ELECTRIC COMPANY.
And as the show's sketch's character's dialogue demonstrates, you may use the apostrophe S repeatedly when there is repeated possession.
THE ELECTRIC COMPANY is a classic of American Pop Culture. Its original show ran back in the 1970s and made a stars out of many up and coming talents. One of the was a young comedian with a PhD in Education by name of Bill Cosby.
PLS English Users salutes Sesame Workshop & PBS - producers of the show - for officially uploading their content to an Official YouTube Channel, enabling other sites to publish and make their content known in a legal manner.