OK it was a lovely warm day today so OH decided it would be nice to do one of the walks in our book (1st time). It turned out to be quite steep uphill for 2 miles but with breathtaking views from the top. It was then a long, slow decline back for another 2 miles. Both DDs were crying on the way up as it was hot & they said their legs were aching. I quite enjoyed it myself - I just like getting out in the fresh air & getting some exercise. But I feel a bit guilty that we made them do this walk when they'd rather be doing something 'fun' and there probably wasn't much in it for them. AIBU to feel like this?