I accidentally joined my husband's ex-wives' WhatsApp group

I was added to a WhatsApp group by mistake last year and it has improved my life. The group is called Alumni. It is my husband's ex-wives. All three. I'm number four. They post his mother's hospital dates and the school fees timetable. The pinned message says: when he tells you his card is not working, it is working. On day one somebody wrote welcome dear, he's sweet in year one, buy your own car in year two. I bought the car. I'm in year three. We're doing Secret Santa.