السلام عليكم و رحمة الله و بركاته If i deliver halal stuff like flowers or cake, but it ends up being for a haram reason like for a birthday or valentine. And i make money from this, is the money i earn haram or is the money halal and i just sinned.

Ustadh AbdulAziz al-Haqqan

Well you don't before hand may Allah reward you so that is on them not you.