Oh, the joys of motherhood....:) B., the truth is, moms who don't experience this kind of behavior are in the very fortunate minority. It's part and parcel of the price tag for living in a safe, secure and wealthy nation, where society encourages us to give, give, give to our children. We love our children, so we're happy to oblige. And thus the entitlement trap is set.
But our children's expectations don't diminish as they age; in fact, the list of wants and needs grows faster than their shoe sizes. And they rarely grow a grateful heart along with permanent teeth. Controlled expectations and gratitude are skills that must be cultured and nurtured over time, preferably in a loving environment just like the one your family offers to your girls, so keep trying. (And although child psychologists probably won't say so, I'm convinced that personality traits really do provide the most important component inthe gratitude equation; some folks are just naturally more inclined to feel gratitude than others, including little children!)
In fact, the only thing I see wrong with the scenario you've described is that you're the only one who is paying the price for the failure of your girls to step up to the plate. Dad's not suffering; he's off on a bike ride. The girls aren't suffering; they're enjoying the sunshine outdoors. And I know just how you feel, because that's the way things often seem to work around my house, too!!!
So, at the risk of sounding like the dirty fork telling the dirty spoon to jump into the dishwasher, here is what I think you should do:
Sit down with the girls and tell them what is expected of them during the coming week. Set three or four goals (not too many for this age, of course) that might include feeding the cat each day, cleaning their rooms, etc. On Thursday, review how well the girls have met their goals for the week. If they're on target, go ahead and plan a fun family outing.
If not, call a babysitter. Go out with your husband and have a great time, guilt-free, just the two of you....knowing that the girls had every opportunity to be part of the fun and will have other opportunities in the future. You may well be able to enjoy a meal at a restaurant not kid-friendly enough to frequent with the girls, or see a great suspense-thriller movie that would not have been possible to see as a family.
If a babysitter is a problem, divide up the free time between yourself and your husband. Let dad have a long morning bike ride, and maybe a free afternoon to drive across town and check out the new bike shop he's been wanting to visit or something like that. He'll probably be thrilled to have a whole day to himself, to do fun things. Then, that evening, you go out to dinner with a couple of girlfriends. When's the last time you had a great, relaxed evening in the company of other moms who can laugh with you about your life? These outings are just good for the soul, and refresh and recharge us as women, wives and moms.
Try this a few times and see whether you see an improvement, even a small one....
And, remember, this motherhood thing is a process, which keeps evolving over time as we change and our children change and our interaction with them changes and our family circumstances change...We do the best we can, at any given moment, and keep tweaking things until we find something that works. But it's unrealistic to expect perfection of ourselves in this area...so stop beating yourself up, and don't feel guilty if your girls miss out on a great opportunity or two. Sometimes children learn more from missed opportuntities than from things they have but don't appreciate.
:)