sharing of debit card..!!

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well one morning one of my good friend came to my room when i was sleeping and woke me up..he was in need of some money..me still half asleep..was too lazy to go to the atm to get money..instead i handed him my dad's atm card ( my card was with my dad some bank issues which he wntd 2 clear) and told him the pin..and went back to sleep..he withdrew d amount he said he needed and aftr doin his wrk gave me bak d card..he was out for lyk 5-6 hrs.. i was f9 wid it..coz he was a gd frnd..bt den l8r i realised dat knowing d card no. nd d pin..he actually owns ma dad's account..i hv changed my pin..but still fear if he can use d card for onl9 shoppin or what..is changing the pin sufficient or shud i do sumthin else too..??