Could he? Yes. Will he? I honestly don't know. My mother simply won't tell him no, that's just how she is. Never risk hurting anyone's feelings. My sister sees nothing wrong with his visits. She seems to think it is a bit overblown, though she does what she's supposed to do for the most part. Basically I and my mom are the only truly rule-following serious ones. But her lack of ability to tell any of her kids no, she just lets him in and convinces herself it will probably be ok. Funny thing is, my brother is uber-sensitive. I have no doubt that if he ever did give it to her and it cost her her life, he would be devastated and never forgive himself. I mention it every time I talk to her, but she simply justifies it with all the "he's careful, he keeps his distance" stuff. I have to accept she will just never say "You know, i think you need to step inside the door and stop right there while we talk." Perhaps, at her age, she's simply not that worried about passing since she lost her husband, my dad, just about two years ago.