Bonjour Lisa, Une très bonne question. If I am understanding your question correctly, the use of chez vs à is the query. Chez indicates someones place, i.e. chez ma sœur, chez Marc, etc.; while à indicates a person, i.e. à ma sœur, à mon père, etc. It appears to me that given the definitions in the lesson: »Notice that the verb visiter is used with places. When visiting people (friends and family) the expression rendre visite à quelqu'un is used and never visiter alone. (This is similar to the English "to pay a visit to someone".)« that using chez . . . one would use visiter instead of rendre visite,. Bonne chance,

Merci buckets!