The stepfather's rigid enforcement of a 'proper sleepwear' rule is causing genuine discomfort to the teenager. The teen's health and well-being should be prioritized over arbitrary rules. Forcing someone to overheat while sleeping is unreasonable and potentially harmful. The stepfather is acting like a tyrant, not a parent.
The teen is deliberately defying a reasonable household rule set by the stepfather. While the teen claims to be a 'hot sleeper,' this does not give him the right to disrespect the stepfather's authority. The stepfather's rules are in place to maintain order and decency in the household, and the teen's blatant disregard for these rules is unacceptable. The teen is being a spoiled brat.
The stepfather's insistence on full pajamas, while intended to enforce discipline, is unreasonable given the teen's discomfort and the room temperature. A balance between household rules and individual well-being must be struck. The stepfather should be more understanding and flexible, while the teen should also try to respect the stepfather's position as a parental figure. However, threatening to take away the teen's phone over pajamas is a clear overreaction and an abuse of authority. Communication and compromise are needed, not draconian measures.