Taeyeon is the leader. She should have the maturity of a leader. That means putting herself in Jessica’s place and asking how she would hope her “sisters” would resolve an internal dispute against her. Would she hope to be ripped off like a Band-Aid? Or that she should be excluded from all immediate and future activities? Would she hope that after nearly a decade as part of their intimate inner circle that she would be treated as though she meant nothing?
Taeyeon has taken her first step towards leading the group into the unpleasant world of backstabbing.