Wife and dog

So a few years ago i mentioned to my wife how I would like to see her with our dog, a Male lab. She agreed, jerked him a few times and sucked him, he would not mount her though, so she just dildogged him. I've never heard her moan like that. She only did it a few times and now when I ask she says she would never do it again but is fine with roleplaying and toys. Any other husbands run into this issue?