After Sirius escaped Azkaban, he met harry, his godson, and on summer break, harry goes to stay with sirius. although sirius wasnt the only one who broke out of azkaban. he broke out with his wife, Meissa Black neé Potter. James' - Harrys fathers - sister. when harry gets the chance to ask sirius where she is, he does. theyre sitting in the living room, when harry gets the courage up to ask

Harry: "Hey, Sirius, the papers said you broke out along with your wife, where is she?"