Allardyce is due to undergo heart surgery on Friday, although Blackburn say the 55-year-old could be back behind his desk early next week.
Lynn will ensure Allardyce does not give in to temptation and contact his assistant boss Neil McDonald by cutting off contact before kick-off, as she did before Sunday's win at Bolton.
"I won't have a hotline to Sam if it's anything to do with his wife," said McDonald. "She confiscated his phone on Sunday and will probably do it again.
"I will probably speak to him before the game and afterwards. We will pick the team together before the game and then speak once it's all over."