My guess is the crippling anxiety results from some previously unrevealed trauma. They could be trying to be relevant by piling on the #MeToo movement. If so, they chose EXACTLY THE WRONG CHARACTER, since she has already been raped/impregnated/gave birth/was raped again by her son-lover. The last thing she needs is more baggage.
Seriously, what a mess.
Yup. Of all characters, Carol needs less baggage, not more. She needs to get past the baggage she has. No more victimization, over anything. Hidden memories need to make her stronger, not cripple her with anxiety.