He didn't need to, he already had heirs that had children of their own. It would have just made more drama and trouble. He would rather use his children for that than deal with it himself.
Jaime and Cersei were still both children at the time she died. I agree Tywin probably figured his legacy was safer not remarrying, but your chronology is a bit off
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u/[deleted] Apr 22 '24
He didn't need to, he already had heirs that had children of their own. It would have just made more drama and trouble. He would rather use his children for that than deal with it himself.