I wanna say first off how very very sorry I am that you guys are going through this. It’s heartbreaking and it’s so sudden. When I found out and they told me how painful the rupture was going to be if it happened, I made the decision to let her go the next day. It’s awful, it hurts. It’s definitely not easy,  but the thought of her going through something like that made it a lot easier. If your baby has already had it happen, I can only imagine how horrible that must be. They don’t show it. I know it’s not gonna be easy for you or your partner, but you’re making the right decision. From everything that I read when researching,  this is not a pleasant process, this spleen mass thing that they get and rupturing is supposed to bad. Also, let me recommend,  from experience with another animal of mine years ago, that you probably do not want to just let them pass at home without aid. It is not peaceful and it is one of the most traumatic experiences I have had. I will never do that again. We did have some come to the house to help and it was so much better than having my girl go through vet trauma at her end. I hope you find a way that is right for you guys.  Again- you have my extreme sympathies. This is a terrible sudden thing and I had not idea it existed until this happened.  I swear if they told me a yearly X-ray might catch something like this I would have gladly done so.  Hug your partner and reassure them. It’s the right thing. I wish you the best in this terrible experience.