There is no ayat or Hadith about couples being made in heaven.
Secondly if you are referring to 24:26, it is a wrong translation by most, there is no reference to men and women there. According to our mufasireen, it means that people are good or bad due to their tongue, and good people speak good words, whilst evil people speak evil words. The end of the verse confirms this “Those [good people] are declared innocent of what they [i.e., slanderers] say”.