1) he tries to kills kk but kk survives (she will have partial amnesia and will not remember what aman said, she will remember only the pre-marriage days) this way aman again escapes from punishment or
2) all that was shown was aman's dream, he was visualizing kk's reaction or
3) he will cover it up by saying its was some joke which he cracked just to check out her reaction or
4) kdmh is ending hence they are rushing to end the show or
5) they are planning to make preeti bhabhi or some other person the new main negative character by ending aman's character