Do they really seek revenge?

Okay, so my oldest son has lived with us for the past few months - getting married in June and wanted to save up for a new home - brings home a beautiful boxer female puppy. Brin and Neo did very well adjusting to having a pup in the house (man boxers are hyper!) but Pru, who does not do well with new situations and/or others, did not care for the puppies antics. Pru would lunge at her - never biting her though.

Okay, so son moves out, but returns home almost every evening for supper (lol!!) and of course brings the pup with him. Well, Pru was in a bad mood last night and lunged and snapped at the pup when it jumped up in her face (pup usually avoids Pru). So I put Pru in the house so that the rest of us could relax a bit.

Pru went in to my bedroom and went pee on my side of the bed! I'm serious - right in the middle of my side!!! Do you really think that she was getting revenge for being put in? Totally cracks me up!!! I hate changing bed linens at 11 PM. And of course, Pru hung her head in shame and was remorseful, so I couldn't really be mad at her.

But revenge, really????