Committed to the Lie
Many of us have found ourselves in similar predicaments. Caught in the moment, we panic and blurt out a ridiculous fib. At that juncture, we face a choice: confess and live with the shame, or double down and commit to the lie indefinitely.
It appears the OP has opted for the latter. We wonder if anyone actually bought into this tall tale or simply decided to stick to their initial story, having made their bed, so to speak."