Option 3, a friend

Naruto had chosen Option 3 after some thought, no matter how hot is mother was he didn't want to make her have sex with him, but he wasn't going to pass up the chance for sex and merely look.

So it was 2 days later, and Naruto was alone in his room, Kushina had left on a mission, telling him her friend would be by at 7 that day, and spend the night. Unknown to him though Kushina was actually in her room under Seal, peeping on him, his wall transparent from her side.

And with that there was a knock on is door, and he shouted at them to "come in", and the door opened.