Learn English – Idiom or phrase for expressing one’s skill/talent has not decayed

She was just being coy about her love life, deciding to play dumb and beat around the bush until you changed the subject. Your response could have been 'don't be coy; answer the question'.

coy (koi) adjective

TFD: 2. Unwilling to make a commitment or divulge information:
"As a child, when I asked my mother her age she was coy and evasive" (Lynne Sharon Schwartz).

Google: reluctant to give details, especially about something regarded as sensitive.

“Pretending not to understand an innuendo” could be rewritten as: unwilling to divulge information of a sensitive nature.

beat around the bush –etymology, SE

to avoid answering a question; to stall; to waste time. -TFD

Bending the ear of a third party, you could snarkily say, "I think she's ignoring me." In your sentence, "She just ignored it."

I think you are referring to the choice between the:

lesser of two evils:

• the less bad thing of a pair of bad things.

  • I didn't like either politician, so I voted for the lesser of two evils. Given the options of going out with someone I don't like and staying home and watching a boring television program, I chose the lesser of the two evils and watched television.

(McGraw-Hill Dictionary of American Idioms and Phrasal Verbs)