[HarleyD]

Also...

"And Joseph awoke from his sleep and did as the angel of the Lord commanded him, and took Mary as his wife, but kept her a virgin until she gave birth to a Son; and he called His name Jesus." Matt 1:24-25

She wasn't a perpetual virgin either.

[Titanites]

"And Joseph awoke from his sleep and did as the angel of the Lord commanded him, and took Mary as his wife, but kept her a virgin until she gave birth to a Son; and he called His name Jesus." Matt 1:24-25

This verse talks about what happened up to the time when she gave birth, it says nothing about what happened afterwards. So, it does not support your claim.

un·til    ( P )  Pronunciation Key  (n-tl)
prep.
1. Up to the time of: We danced until dawn.
2. Before (a specified time): She can't leave until Friday.

"She can't leave until Friday" does not mean that she did leave on Friday or anytime thereafter.