Mf bed bugs

I’m trying to help all three of them understand what they’re dealing with and what the possible treatments are. I love these people and want nothing more than to help them achieve 100% eradication. The first infestation is full scale, my meticulous efforts to powder and spray are not enough. They refuse to heat treat or bag up items. The second infestation is small enough that i think the powder, spray, and bagging of all fabrics would do it but the man of the house would rather live in denial despite live sightings and carcasses. The third infestation might or might not be taken care of, those people are doing whatever. I can’t stand to think of them suffering this because the one in charge refuses to accept it exists. Do i refuse to gather during holidays because i don’t want to bring the bb’s home with me?? Anyways, FYI: 120 degrees will kill bed bugs, so will diatomaceous earth. The spray only kills what makes direct contact otherwise just sends them into hiding until it wears off.