An organopolysiloxane containing both an amino functional organic group and a mercapto functional organic group is disclosed. A method of making such amino-mercapto functional organopolysiloxanes is by reacting (A) a silanol-functional polysiloxane, (B) an amino functional alkoxy silane, and (C) a mercapto functional alkoxy silane, via a condensation reaction. The amino-mercapto functional organopolysiloxanes products are useful in textile and fabric treatments.