I don't WANT to spend my time away from my children. I want to get home as soon as I can after work, I want to feed and bathe them and watch them fall asleep in my arms. I can't do that when out riding my bike
Very, very true.
Yes, money can become an issue if you let it. You seem to be being sensible and not feeling the urge to splurge on over-priced tat. Well, not regarding baby things anyway.
No sex? We had 5 weeks 'off' (last week of pregnancy, first four weeks after birth) and then.. well, we enjoyed ourselves again.
No sleep? Suck it up! The first two weeks are a hideous shock to the system; the first six months will leave you crawling. BUT your child is magical and you can only forgive them. You have to take exhaustion into account with your missus and ignore/forgive her crankiness; the chances are that half the time it's your own exhaustion that's leading you to perceive it. Oh, and you're probably being a dick through sleep deprivation anyway. After that it's all plain sailing.
The first six months are tough going if you get involved; if you don't then you're missing out so forget bikes for a little while. They'll still be there when things calm down a bit.
And congratulations; enjoy it! 🙂 It is truly the best thing that can happen to you.