Imanana2025, How sad that you are in this situation with your man friend , His children should be happy he has someone in his later years, they should see that it takes the efforts off them to keep him company ,
Can you possibly arrange a meeting with his family, explain how you feel about their Dad, that you aren’t a gold digger, you have your own money, suggest he draws up his will with their inheritance in it so they can’t accuse you of being a gold digger,
He obviously has feelings for you. , I can’t understand why his family would want to see their Dad upset ,
Good Luck , it needs careful handling but I really hope it works out for you both ,