kin son ), ▁des per ately ▁try ▁and ▁make ▁M andy ▁see ▁that ▁what ▁Joe ▁is ▁doing ▁is ▁wrong , ▁with ▁M andy ▁agree ing ▁to ▁end ▁the ▁relationship ▁for ▁K atie ' s ▁sake . ▁Un be known st ▁to ▁M andy , ▁but ▁Kar en ▁has ▁begun ▁an ▁affair ▁with ▁Joe . ▁After ▁P addy ▁is ▁kid n apped ▁and ▁forced ▁to ▁take ▁hero in ▁by ▁a ▁woman ▁named ▁Ma ure en , ▁she ▁is ▁still ▁intent ▁on ▁reven ge ▁for ▁P addy ▁getting ▁her ▁daughter ▁hook ed ▁on ▁dru gs ▁which ▁eventually ▁led ▁to ▁her ▁death . ▁Ma ure en ▁contacts ▁M andy ▁to ▁come ▁over ▁to ▁her ▁house , ▁where ▁M andy ▁real izes ▁who ▁Ma ure en ▁is ▁and ▁a ▁physical ▁sc uffle ▁ens ues . ▁Ma ure en ▁then ▁causes ▁an ▁explos ion ▁just ▁as ▁P addy ▁and ▁Mic key ▁Mag u ire ▁( C iar án ▁Griff ith s ) ▁arrive , ▁instantly ▁killing ▁M andy ▁and ▁Ma ure en . ▁K atie ▁is ▁seen ▁att ending ▁M andy ' s ▁fun eral ▁in ▁P addy ▁and ▁M imi ' s ▁care . ▁ ▁In ▁Series ▁ 7 , ▁M imi ▁dec ides ▁to ▁take ▁K atie ▁to ▁Not ting ham ▁so ▁that ▁Lip ▁can ▁look ▁after ▁her ▁and ▁help ▁her ▁through ▁the ▁gr ief ▁of ▁losing ▁M andy ▁at ▁such ▁a ▁young ▁age . ▁ ▁K atie ▁is ▁not ▁seen ▁or ▁mentioned ▁again ▁until ▁the ▁ele vent h ▁and ▁final ▁series , ▁where ▁Frank ▁is