Never mind a taxi. He could get a bike.
I agree with Yorick. It's the gesture that this man wants. A gesture of good faith. The OP could get a part time job and still schlep the DS to and from school.
I think this H wants to stay married and the OP despises him for that. I suspect she has despised him for a long time. Perhaps this is an element in her intimacy issues - she prefers power to the equality that is implied in intimacy? Now she has a reason to be openly contemptuous to him.
I also agree with BadToTheBone. Occupation of the moral high ground only makes the relationship nasty. The H doesn't have to stick around to have that thrown in his face for ever more.
Everything the OP has posted here about her H constitutes a list of unreasonable behaviour on his part and on hers for the purposes of divorce. She is trying to gauge whether her position as a sahm of a 15 yo who does almost nothing around the home and hasn't had sex with her H in ten years might negate his affair. She emphasises that 4.5 years is a long time.
www.divorce-online.co.uk/DOL-Forum/threads/unreasonable-behaviour-examples.3028/
Here's a list of examples of unreasonable behaviour;
'The Respondent has been violent towards the Petitioner.
The Respondent has threatened the Petitioner with physical violence or has been physically abusive.
The Respondent has been verbally abusive towards the Petitioner.
The Respondent drinks to excess, and when he is under the influence of alcohol he behaves in an unreasonable and aggressive manner.
The Respondent is financially irresponsible, and has failed to maintain the Petitioner and/or the children properly during the marriage.
During the marriage the Respondent has gambled to excess and has, on numerous occasions, caused considerable distress to the Petitioner by running up large gambling debts and dissipating the family’s savings.
The Respondent has formed an improper relationship with a woman whose identity is unknown.
The Respondent refuses to discuss the issues within the marriage with the Petitioner.
The Respondent does not want to engage in any sexual or physical relations with the Petitioner.
The Respondent shows no interest in socialising with the Petitioner and prefers to socialise alone with friends.
The Respondent refuses to try and resolve the issues and continues to behave in an unreasonable manner.'
This thread is like His 'n' Hers checklists.