Doubt is not the enemy of faith…fear is.

Stop and think about that for a second. The issue is if there were blood siblings of Jesus. Is there evidence of this? No there is not. Is there misinterpretations of the Word of God that say there were? Yes. Bear in mind that even Luther, Zwingli, and Calvin all believed in Mary’s perpetual virginity. PM me if you need more citations…I’ve got 'em.

Why would this bother you? God has assumed many people in the context of thw Bible has He not?
Consider: If He assumed Moses and Enoch and some of the prophets of the OT, why would He not do it for the second most unique person in all of history aside from Christ Himself? Mary’s holiness and relationship with God are well known. As for Traditional documentation,
have you seen this.That is not a defined dogma of the faith, so blow it off. However, since Mary is the mother of Jesus and all grace does come through Him, then, in an indirect sort of way one can say that graces did indeed come through her. I do not believe that Mary’s prayers are necessary for our salvation and the church has never taught that to my knowledge.
Ligouri can be wrong…that is not infallible.I know of no Biblical source that indicates that Mary sinned, do you?
Those ECF may have been conjecturing, since they did not know the Blessed Virgin first hand, did they?
I have no problem with the idea that the Blessed Virgin may have led a sinless life. The fullness of grace in her life and the fact that she lived every day of the life of Our Lord with Him, having been the very first believer by virtue of her fiat all indicate to me that possiblilty.
Considering that actually living with and raising Our Lord from birth consititutes the most intense example of a “personal relationship with Jesus” (to use the n-C term) that I can imagine, I find it not incredible at all.
Don’t be leaving the faith my brother. PM me if you need to talk more seriously and personally.

Pax tecum,