Whistling

彼女はもちろん、私も口笛を吹けない。恐らく夫も。

She, of course, can't whistle either. Probably my husband too.

そんな彼女だが唇をブルブル震わせ、ブーっと鳴らす技を取得しブームになっている。

She is in such a situation, however, that she has acquired the ability to make her lips quiver and buzz.

喋るときや発音にも恐らく大事だと思うので喜んだ。が、夫は彼女に唾を飛ばすなと小言を言ったから倍返ししておいた。

I was happy because I think it's probably important when speaking and pronunciation. However, my husband told her not to spit on her, so I doubled it up.