A note, Kyousuke already had turned 18, since the last Comiket,

The Time with Ayase:
This section was told in later Volume 12, which as on December when Ayase was confessing to Kyousuke, which Kyousuke started looking back in the past of the memories they had.
One day, when Kyousuke and Ayase went shopping for ingedients. They bumped into Iori Fate Setsuna, the person who had stolen the Kirino's novel. (I explained this story back in S1EP8) She was carrying a child, which she pointed out that the child isn't her's, and that she is working at child center. Fate then asked if he is hanging out with his girlfriend, which both Kyousuke and Ayase denied the fact. Kyousuke then introduced Ayase to Fate, and then Fate asked Kyousuke a favor, which Kyousuke quickly declined before she could explain it, due to her tend to call for trouble. Ayase then convinced Kyousuke to listen what she had to say, which Fate as them to care for the baby whiles she goes plays Pachinko. Kyousuke was holding the baby, which he felt somewhat relieve that they're the ones taking care of the child, and that Fate could have done something worse.
Kyousuke then took care of the child and made funny faces to make the child laugh. Ayase notices this and said that he is skilled. Kyousuke then pointed out that he used to care for Kirino when she was 3 to 4 years old, and that Kirino use to be picky with things and would cry a lot. Whiles talking, Kyousuke notice the child becomine displeased, which he then started to change the child's diapers. Ayase lended a hand and was holding the baby, which her cheeks red, which she then said she never had held a child before. Kyousuke then gave her a tip to not be nervous and taught her how to hold a baby.
Kyousuke then asked Ayase to wait with the baby as he goes to purchase new diapers, which he then later returned and with Ayase trying her best to cheer the child. After changing the child's diapers, the child was still unhappy, which Kyousuke told Ayase to give the child milk, which had Ayase misunderstood him and hit him, which Kyousuke quickly followed up saying 'cow's milk', which Ayase then started calling him a pervert. While they were quareling, the child then pulled down Ayase's strap dress, which revealed Ayase's "very imporant part". Time froze as Ayase looked down and shrieked, and as Kyousuke tried to explain, Ayase gave him him a kick. Although, Kyousuke not feeling much regret. After time had passed, they explained what had happen to Fate, and Fate saying that Ayase's kick is something she hasn't seen before.
After recall this memory and others, this is when it Kyousuke returned back to reality can gave Ayase's his answer to her confession.
S2EP14 SPOILER!

The Father's Visit:
In the Light Novels, at one day, Kyousuke was visted by his father. His father then asked if he was doing well, which then led to him asking where the refrigerator came from, which he answered it being from Kirino, which the father's expression then changed. Then, the father pointed out on what was on Kyousuke's bed, which is the eroge that Kirino had given him. Kyousuke expected to be beaten by his father, which then the father said, "Beat you? This is from Kirino, isn't it?" Kyousuke was then surprised that his father was fully aware of Kirino's hobby.
His father, after having some thought, he then said, "I had decided this once before — I leave Kirino to you." and "So, should something unfortunate happen, things will not go like last time.", which Kyousuke replied that he understands.
The father then pulled out a folder of A4 papers out of his bag and gave it to Kyousuke. It carrying dozen of small folders inside that containing such as a date, obtained goods, price, etc. The title was censored, and keep in note that Kyousuke's father is a police officer. Kyousuke then asked, "Is… isn't that a paper for convicts?", which the father didn't reply and told him to just write down unto the paper, which Kyousuke asked why and the father replying with, "Look at yourself. Aside from the refrigerator, you had received so many other things. So in order to thank them properly later, make sure to write it all down. Also, write down the progress of your studies and paste thereceipts of whatever you buy in the folder." Kyousuke then started writting down, which these words where in his thoughts, "A refrigerator from Kirino, last year's mock exam's question from Manami, a bento box from Kanako, a toaster from Akagi, a kitchen knife from Ayase, two bentos from Kuroneko, and one more bento from Manami….." After the father received and read his papers, he gave Kyousuke a punch, which he angry that he was worried for him, but he was living a luxuriously everyday.
Then, Kyousuke's door range, which there was a delivery man who said these words, "Kousaka-san, this is for you! From… Mikagami-san, a 'Special handmade cabinet' and 'Ultimate Naked Series - Imouto Figurine Gift Set.' Is there a problem with anything?". The father then asked what were those, which Kyousuke couldn't reply. During that night, Kyousuke had the cabinet assembled, which the father actually had stayed to help. The excuse the father gave was that the manual said that it require 2 people to assemble the cabinet. As for its cost, it was ¥100,000, and why Kyousuke couldn't just throw it away.