I am no longer employed, so during the winter I can sometimes spend all day sewing if I care to. There is little on TV that is worth watching these days so I can spend all evening sewing too, time flies and it keeps me from the biscuit tin and the fridge!!
During the summer the gardening and allotment takes over and I might not come back into the house until very late so less sewing is done.
Only you know what 'too much' sewing is, if there are other calls upon your time.