My dd turns 7 in a couple of weeks and my ex (her dad) has just informed me that he is getting her a quad bike, not a childs one that goes 3mph but a proper one that can go up to 45(!)mph. AIBU to think it's dangerous and to say no? If he buys it anyway what can I do? By the way he is not planning on taking her to a proper track to use it but "down the field" :/.