(My husband has been very adamant that we take the grandparents up on their offers of babysitting once the baby arrives, so that we can go back to riding together even before she is old enough to tag along, and we should be able to resume other stuff like hiking as soon as I am recovered and the baby can hold her head up in the carrier. So our situation is, I hope, temporary, but I am pretty cranky about it right now.)
As a mom of three, I think your husband should give up his long rides on the weekends for now. You may feel just a little cranky about it now. When that lack of sleep kicks in and he's still feeling entitled to long rides on Saturday, your "little" cranky could turn ugly real fast.

Having a baby means giving up stuff. He should start practicing now, if only out of respect for you.

Karen