Last fall we helped my inlaws make spaghetti sauce with meat.  The meat was browned, drained and added to all the rest of the ingredients for the sauce.  They put the Mason jars in the oven to get them hot and then they proceeded to fill the jars and put the lids on.  That's it. 

Right from the start I felt like something wasn't right.  I was thinking that the jars should have been boiled afterwards or something.  They don't own a pressure cooker, so that wasn't an option.  I mentioned the boiling and they said that it wasn't needed. They are in their 70's and have been making their own sauce for years.  But they have only been adding ground beef for the last 2 years.  They don't own any cookbooks, so I know for a fact that they just thought that adding meat would be a good idea and they didn't alter the recipe besides that. 

We ate some today and it tasted funny.  Bad funny.  Now we are paranoid and are thinking of throwing the rest of the jars out.  What do you think?  Is their method wrong?  I don't want my family to get sick.

P.S. - Last summer they gave me some packages of frozen green beans and they were just tossed into a freezer bag, not even blanched first!  That's why I am doubting their freezing/canning skills!