I'm so shocked

that Marley did this on his favorite spot twice .....
I don't know what is going on with him he has never done this...he is not neutered because I'm terrified.... could this be the reason?
Also Leeloo is our new baby so I wonder if it has to do with jealousy
I really need to resolve this because he is my baby and I don't want to restrain him in any way.
Is there anything I can do?