I am sure you love Sal and your husband very much, and it may sound like we are hysterical and overreacting. If so, I get it, but your situation is very serious. Sometimes it is easier to see from the outside.
I suggest you might want to speak with your own, individual counselor about this situation.
I would think a temporary separation until Sal can be safely re-homed, either to his mother or possibly to some kind of treatment center, given the circumstances, would definitely be in your baby's best interest as difficult as it would be for you, and understanding the strain it would put on your marriage. It is better to be proactive than to one day find Sal experimenting with your infant, or toddler, or preschool, or elementary school aged son, as you have already discovered him doing with your pet.
I am sorry to be so blunt but that is what you are facing as long as Sal is allowed to live under the same roof as your baby.
