Adding my Husband and Son to Deed in Manassas, VA

[Account Closed]

posting this q for my mom as when she just called an asked what i was doing at the moment i explained i found this awesome site where time seems to flyyy by =D and she said why dont u ask for me an RE q..

when my brother (a single never married airforce veteran) died a year and half ago, he left behind a simple will that passed his only asset - his home in DC secured by a VA loan - onto my mom who is married to my dad.

my mom wants to add her hubby and me to the deed which currently has some sort of document in the Prince William County courthouse that her attorney at the time filed for her  with the deed of record, illustrating that title was passed from my bro per his death to my mom via will then probate.

interestingly enuf, when we asked the attorney for a deed in her name for the VA mortgage, the lawyer explained it would cost more for the Court to print a new deed so the document filed showing that title passed to my mom is essentially the same as the deed being recorded now as in her name.

anyways it turned out to be okay since when my mom contacted US Bank the mortgage issuer/holder they accepted whatever doc attorney faxed over to them (We did not see) and assigned the mortgage over to my mom without requesting any docs like tax return, income, etc and now the mortgage is in my moms name which is all fine and good 

except now my mom says she wants to add me and my dad to the deed/title and was wondering the easiest or most affordable way to do so without paying transfer tax or anything like that.

also are there any options when adding family to deed, i mean is joint tenancy feasible despite disunity of time? as long as there is rights of survivorshp for remaindermen survivors it will be fine.

please advise.. thanks and sorry yea i'm not well versed in VA state law i only lived there a short time.