I can't imagine trying to co-parent with any of my exes, let alone the addicted ones. Sending you peace and strength and a big ole pat on the back for your recognition of the codie head rearing!
And a big high-five to your DS for hoping on the back of the Harley - my dad used to pick me up from kindergarten on the back of his old Honda motorcycle (we lived 5 blocks from the school so mom allowed it.) All the kids were in awe and would say - WHOA! Is that your dad?! <3 Best memories ever, there!