Rihanna was home with her 3 kids at the time an assailant targeted their L.A.-area mansion with gunfire -- but her husband, A$AP Rocky , was MIA, TMZ has learned. Sources with direct knowledge tell us ... the singer was shacked up inside her house with the children she shares with A$AP -- namely RZA ,  Riot Rose , and  Rocki Irish -- before all hell broke loose on Sunday afternoon. The suspected shooter, Ivanna Lisette Ortiz , allegedly fired off several shots from her vehicle at the residence .