This started recently after her father's girlfriend left him. Now only the two live in the apartment. The first time he called her to his room he was naked on the bed with his dick hard and asked if she could do something to help him, she gave him a hand job. The second time, a few days later she gave him a blowjob while he touched her tits and she admitted she got really wet. The third time it was the same but he put his fingers in her pussy and felt how wet she was. The fourth time they actually had sex and since then it's getting better and better, her own words.