His own mother

His mother insisted, knowing that it would be more awkward for Terry to sit on her son's lap. Terry gave in, and sat in the passengers seat next to Alex's dad.

His mother moved her voluptuous ass onto her son's lap, and tried not to move to much. It was going to be a long ride, but she was willing to endure through it.

After thirty minutes or so passed, Terry was already flirting with Alex's dad as he ignored her advances.

While Alex's mom was too focused on her sister trying to have sex with her husband, Alex's erection started to grow as his mom moved her hips more as she adjusted her sitting position several times.

Her ass cheeks felt so good, and soon his dick started to push passed his pants and underwear, his dick landing in-between her ass cheeks bare, squeezing under her skirt.

He cursed at himself for getting turned on by his own mother, but couldn't help lifting her skirt up with his hand. The sight of his dick inbetween her ass from behind made his dick throb harder.

He could already feel his pleasure building up.