It rubs me the wrong way...

That my mom has maintained a long-term false friendship with my older brother to someone else, going so far as to send emails pretending to be him. I don't pay attention to my brothers' business but the thought of having to pretend to care for someone and the inevitable drama that would come out when it's learned that a set of parents have continued it on for many, many years when that someone else could have had a more honest relationship with another person...

My mom calls it sacrificing to bring that someone else happiness. But is maintaining a false friendship true happiness, no matter if it only comes up a few timers per year?