my dad would have the same reaction . he has found me flopping before and he called his brother who is also an addict instead of the ambulance . i think it comes from him being older , scared , and scared he was going to get me in trouble if he called the squad . not to mention that my mother did actually call the squad because she couldnt wake me up once , well i woke up when they did a chest rub on me . then they tried to give me narcon and i ended up fighting them . in the end they did not give me the narcan but i did end up doing 6 months in county for assult . anyhow my point is that i think your grandma calling your mom instead of the squad is a very normal response for an older person , especially one who has dealt with addicts in the past .