Give the updates as soon as possible.
Let Madhu gets surrendered to him at first even though she would not like to do that. For first couple of times, madhu will allow him to touch her and use her in her marital bed even though she was not willing to do that. Let him user her with her kid sleeping next to her. Don't make his husband cuckold please. It would be better if she fucks him with her husband approval. Then gradually husband will start feeling jealous and envious of losing her to him.
Please try to build the story down this line. Just giving my suggestions here, but final decision is always upto the author of the story here. Thanks for this story bro. Please try to give regular updates.