Poor Boomer...that sucketh mightily. Gives Boomer a hug.
Empathise a lot.
Point out that the faster Mo learns to read, the faster he can enjoy the books he loves whenever he wants.
Explain that, as his loving mum, it's your job to ensure he learns to read really well, because you know that is going to be a fabulous part of his life.
Explain how much you want to read to him.
But...make the length of time you read to him contingent on him making a damn good try re HIS reading....so, if he works at his reading, he gets a long read from you (mebbe interspersing HIS reading, and as a reward along the way?)...if he won't try his own reading, he gets a shorter read from you.
Do you run your finger under the words as you go when you read to him at all?
Some kids seem to find that helps with picking words up fast.
But..I'd defer to the teachery folk on that.
I'd not immediately try to up the amount of time MO is reading to you...I'd sneak it up slowly.
Dunno if any of that is worth anything...