Making Mac and Cheese

Something that means more that just making Mac and cheese. You are not literally making food, but it is something that occurs nine months before someone is born that is referred to making Mac and cheese.

A: What is mum and dad doing so late?
B: Making Mac and cheese.
A: Can I have some?
B: I don't think so.

Making Cheese Angels

Just another word for having sex

"We just were Making Cheese Angels."