Note: events in this short story take place one week after part 2. All characters are at least 18 years old.
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Matthew came into his bedroom and saw that the room was already set up, and Ava was lying on the bed wearing only panties and a bra. Recently Matthew's younger brother Tom had started asking questions about how to be with a girl - he had a new girlfriend, Ashley, and was nervous about pleasing her when they had sex for the first time. Tom had just turned 18 a few weeks before. Matthew had even caught Tom spying on him and Ava the previous week but he hadn't said anything to Tom yet. Today he was going to do better than telling Tom how to please his girlfriend; he was going to show him.
Matthew walked down the hall to his brother's room and opened the door without knocking. Tom was at his computer watching porn. Matthew grabbed him by the shoulder and said "Come here." Tom followed him with a confused and embarrassed look on his face to his older brother's bedroom.
When he saw Ava lying on the bed, Tom said "What's going on?" He tried to leave the room, but Matthew pushed him down into the chair.
"Sit and listen, little brother. We are going to show you how to get your girlfriend off when you finally sleep with her. Now shut up, stay in the chair and watch." Tom looked very uncomfortable but did what his brother told him. Tom was ten months younger than Matthew and has dark brown hair. He was lean and fit but compared to his ripped brother he looked skinny and weak.
Matthew began to speak: "Before you have sex you need to make sure the girl is turned on. This is because when a girl is turned on her pussy gets wet and it's easier to enter her. Usually any girl is wet enough for me even without foreplay, but here's what you'll do to Ashley."
Matthew walked over to Ava on the bed and kissed her deeply. After a minute he moved his mouth down over Ava's neck and shoulder until he got to the top of her breasts. Tom watched on in a mixture of embarrassment and fascination. Matthew lifted Ava so that she was sitting in his lap and unhooked her bra. His mouth immediately moved on her breasts, sucking and biting her nipples. Ava ran her hands through his hair and let out a sigh of pleasure.
Matthew turned to Tom. "Here's what you do next."
Matthew lay Ava on her back and knelt down in front of her. He took his time pulling down Ava's panties, teasing her.