Sasuke summoned one Snake during that trio summoning Team 7 did after Sakura got her seal during the War. He was actually somewhat cordial with it. So, its probably that snake.
Oh yeah I remember that. It didn’t really make any sense then either to be honest.
Also, how can you blame someone so sexy for anything? Just look at Itachi.
hmm.. ok yeah that's true.
Aoda: “I serve master sssssasuke”
Sarada: “Papa? Why?”
Aoda: “Because he’s so sssssexy”
Aoda: “dat assssssss”