The posts posted to you by me and Roberts earlier explain that Matthew 13:55 can only be understood in a way consistent with the other verses in the Scripture if "brothers" and "sisters" are used by St. Matthew in its expansive sense, as kinsfolk.
"Matthew 13:55 can only be understood in a way consistent with the other verses in the Scripture"
Please show me which other verses of scripture Matthew 13:55-56 contradicts. It doesn't. What it does contridict is your false teaching about the perpetual virginity of Mary.
And don't run to Matt 1:25. Matt 13:55-56 makes clear what "till" in Matt 1:25 means.