Meaning of "・・・・・・ありません." at the end of a sentence


I am fairly new to Japanese and am reading through a book passage with this
sentence:

"決して、 侑としずくの 楽しそうなお出かけに ヤキモチを焼いたわけ では・・・・・・ありません."

I can make sense of the first half, but the addition of "・・・・・・ありません." at the
end throwing me off on grasping the true meaning.

