Can Brother & Sister Marry on same day and at same place? Can two brothers marry on same day and same place or at different places?
Kanya Daanam & Kanya Grahanam should not be done on same day by same family. Daanam (donation / charity) and grahanam (taking charity) makes the punya neutral and provides no punya.
After the marriage of sister, brother needs to wait for an year to get married and vice versa.
As the father of both (brothers / sisters) is the same person, the father gets the responsibility for both – Kanya Daana & Kanya Grahana.