Wife & Satisfyer

So my wife recently got a Satisfyer - she is reluctant to use it because she cums almost instantly once it's on and squirts like crazy. She doesn't squirt any other time but pretty much does the minute she puts the satisfyer up to full power. Naturally I love this and dream of her squirting over my cock using the toy but I think she finds the whole experience embarrassing - it takes a lot of persuasion for me to get her to use the toy. We're quite vanilla really and she's not very body confident. Anyone got any tips so my wife starts feeling as aroused about this as I am? She knows how much it turns me on!