▁Mag u ires ▁and ▁tell ▁them ▁he ▁continued ▁to ▁phys ically ▁ab use ▁M andy ▁( Sam anth a ▁S idd all ), ▁Jam ie ' s ▁sister . ▁Jam ie ▁moves ▁home ▁with ▁Kar en , ▁and ▁she ▁soon ▁finds ▁out ▁she ' s ▁pre gn ant ▁again , ▁not ▁sure ▁if ▁the ▁father ▁was ▁Jam ie ▁or ▁Joe . ▁ ▁Despite ▁being ▁port rayed ▁as ▁one ▁of ▁the ▁war mer ▁of ▁the ▁Mag u ire ▁family , ▁Jam ie ▁has ▁become ▁somewhat ▁of ▁a ▁dark ▁and ▁ag gress ive ▁character , ▁possibly ▁due ▁to ▁him ▁taking ▁on ▁the ▁family ▁business ▁while ▁his ▁father ▁was ▁going ▁cold ▁tur key ▁when ▁recover ing ▁from ▁drug ▁add iction . ▁Jam ie ▁is ▁shown ▁to ▁go ▁to ▁extreme ▁lengths ▁to ▁get ▁reven ge , ▁sending ▁one ▁such ▁message ▁to ▁Joe , ▁after ▁finding ▁out ▁about ▁Kar en ' s ▁affair ▁with ▁him , ▁by ▁dig ging ▁up ▁his ▁recently ▁dece ased ▁father ▁and ▁leaving ▁him ▁sl ump ed ▁outside ▁of ▁the ▁local ▁shop . ▁He ▁also ▁proves ▁that ▁unlike ▁his ▁two ▁brothers , ▁he ▁is ▁a ▁very ▁effective ▁deb t ▁collect or ▁and ▁head ▁of ▁the ▁family ▁business , ▁having ▁no ▁qual ms ▁about ▁threaten ing ▁or ▁inj uring ▁if ▁it ▁brings ▁results . ▁ ▁Jam ie ▁becomes ▁a ▁father ▁in ▁Series ▁ 7 , ▁but ▁after ward ▁witness es ▁the ▁grad ual ▁mental ▁break down ▁of ▁his ▁wife ▁Kar en , ▁una ware ▁that ▁the ▁over wh el ming ▁gu ilt ▁and ▁self -