There is nothing, repeat nothing, in Mary's statement indicating she was vowing to remain a virgin.
If you think you engaged in exegesis, you need to go back to wherever you got your Greek training and get a refund.
Unlike you, however, I documented my sources. I put these verses in my post on how the NASB, KJV AND DR translated the passage in question.
If you think Mary's reply to the Gabriel indicates perpetual virginity you are practicing deceit in your translation.
It's. not. in. there.
Here's a challenge to you. Using the Greek and that verse only, show how Mary is saying she is pledging perpetual virginity.
I'll go paint my house while you dig that up.
In your opinion. Every single non-Catholic has ignored the citations from the book of Deuteronomy that strictly prohibits Joseph from a conjugal relationship as well as the Example set by David in 2 Samuel.
Can you cite anything from the Talmud that reverses this: In the The Babylonian Talmud: (Neusner vol 11 pg 123) It states that a man can not enter into a marriage contract with a woman who has been made pregnant by a former husband. If he does, he is required to give her a bill of divorce, and not remarry her.