Girlfriend wears seat belt

Hi everyone (I don’t really know how to start a post) so let me get right into it. I love anal sex (I’m a male) and would love to buy a harness for my girlfriend. She’s on board with the idea and we’ve tried a few already but they broke (the o-ring thing broke). Since I have some BD and similar toys these will have to fit. Does anyone have experience and can share a product that would fit this category? Or maybe something similar that would also give her pleasure? Thanks everyone in advance and have a great weekend!!!

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