Noah had noticed Jen's quick escape but he could have cared less, and if he had said anything, he would have gotten lectured by his wife, so he maintained his at the moment.
What he had not expected was that Jen would avoid making eye contact with both of them through dinner, which caused his wife some concern.
Lucas kept reassuring his mother that nothing was wrong, and she was just tired as he whispered to Jen to act normal. Jen would have been able to do so if she saw the couple after a couple of days, but she had to see them before she had calmed herself so her feelings of embarrassment were reignited.
Both Jason and James acted like they did not know what happened and calmly ate their dinner. At least James looked calm, Jason was watching the show with a very amused expression on his face.
Hellen was confused, and Noah maintained a serious expression on his face as if he did not know what was happening. It was truly funny.