The verses you quoted only prove that Mary was a virgin and unmarried until that point. There is no explicit or even implicit denial of the fact that she did not get married later on after the birth of Jesus. Why is it so hard for you to believe that Mary married Joseph the Carpenter and even had other children with him? There is mention of this in the New Testament. In fact there are inferences in it that Jesus himself married. Marrying is an act of piety.
I replied in the context of what you said about the Lahori group.
Yes, the Lahoris believe that Yusuf al-Najjar, i.e., Joseph the Carpenter, was the biological father of sayyidina Eisa (معاذ الله).
As for the aftermath, I am only worried about what is in the Quran. What happened other than that will not effect my aqeeda. Maybe someone like Reza Aslan can give you an analysis what happened after. Also, as I stated, I wish the Israeliyat did not make its way into our hadith. It has caused a big issue when it comes to hadith.
As for the rest of the information I need to give a background. I had a debate with an Ahmadi girl years ago. This was back in 2002. To be honest, your view shows that there is not much difference between the Lahori view and the Qadiani view.
Also, this girl actually said that Qadianis are the 73rd sect in a literal sense and no sect will come in the future. When I pointed out Lahori, she ignored me. When I presented views from the Lahori sect about the finally of Prophethood, she again ignored me.
So this is the reason I made these points. Let me read up more about this topic, and I will ask more questions.