Hi Lisa,
Sorry to hear about your father, I lost my father some years back (cancer too) so I know how hard a time you are going through right now.
I cant see why you couldn't do a heart from you even that there is one from your stepmother. If you feel for a heart I really think you should do that. If you are doing both ,from you and your stepmother you can simply make them different. Did he have any favorite flowers or colours?
Pia

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