Well i am glad you and the mrs could talk about this subject in the first place, you dont k ow how many ppl can only dream about that. Kudos to her for being open and trsut me she (and you ofc) will enjoy the fun with a doggo.
If you have the means get a dog of your own, "trying out" with a strangers dog is ... even if u get a pup and u have to wait for him to grow up (read up on age of maturity etc.) It will be great and u can tease each other till then.
With the technical side of things there are a lot of us here with plenty of experience so dont hesitate to contact us via dm.
Hope you will have a great time here and in time at home as well ?