Yes, "upset" is a predicate nominative in this sentence. It renames the subject "Sidney" after the linking verb "make." In this context, it indicates that Sidney is in a state of being upset as a result of the teasing.
indirect obj
predicate adjective A+
The complement "upset" in this sentence is functioning as a subject complement. It describes the state or condition of the subject, Sidney, after the action in the question (teasing) was performed by the subject (you).
A plus= predicate adjective
indirect obj
yes yes it did :P u smart a**
It's difficult to determine how Sydney felt without more context about the situation. If the teasing was light-hearted and Sydney participated in it, she may not have been upset. However, if the teasing was mean-spirited or targeted, it could have hurt her feelings. It's best to communicate directly with her to understand her feelings.
Teasing usually make conflicts worse.
Provoking someone typically involves intentionally saying or doing something that is likely to make them feel angry, irritated, or upset. This can include making offensive comments, teasing, or deliberately trying to upset them in some way.
Mean teasing is a form of bullying. The bully uses words meant to sound like good natured teasing but with the intent to hurt or make fun of the victim. You might say that it's cowardly bullying. But then, bullying in any form is a cowards 'game'.
Taunting means teasing or provoking someone in a way that is intended to upset them or make them angry. It involves saying or doing something to deliberately provoke a reaction from another person.