Question

_____ I am not bothered that he dumped me; the _____ of the _____ is that he cheated!

In a fact the matter / matter / fact
For the fact in matter / fact / matter
As a matter of fact / fact / matter
Of the matter in fact / matter / fact

Answer 1

As a matter of fact
fact
matter.
Hope it helps

Answer 2

As a matter of fact / fact /matter. .