Pena Rivas, Alison, age 44 of Dorchester, formerly of Puerto Rico on August 27, 2010. Mother of Julissa Rivas of Dorchester as well as her extended family and many friends throughout the Boston area. Funeral Services on Monday August 30 at 301 Columbia Rd. Dorchester beginning at 10 AM. Relatives and friends are invited. Interment Mt. Hope Cemetery.