Absolutely this, every word, including the rest of the post that I didn't quote.
I love cycling, my husband does it strictly for fitness. We rarely ride together, though hope to do more together when dd starts school in September. I can see while you feel a bit stranded and betrayed. I think that your dh could reasonably be expected to take on the parenting on Tuesday nights, or to organise childcare a couple of times a week so that you can go. Can you take the initiative and put a plan together with him so that he can help organise things for you to get your training back up? Good luck. I think you can do this.