This gives YOU a glimpse of how hard it is for HIM to end his AFFAIR.
You KNOW its not helping your marriage when you pick up, but you feel comptelled to do it despite that...
HE feels the same way about his affair... I think he knows its not helping him, but he's addicted to pursuing that contact... even though its an unhealthy dynamic.
This gives you some insight into how hard it is for him...
If you want to end that affair, you need to stop picking up that phone OR cut yourself OFF from the phone by handing it over to a safe support person.