Maybe she is a woman that doesnt like women,I know a few of those!We are very lucky with our customers,were always being offered coffee but as scrim would say "time is money and there is no time for coffee!!"
If I was in Scrim's shoes I personally might pass on some coffee offers but I would never stop you taking up the offer anytime you felt you needed a rest and a chat.
Not trying to be funny but women are the weaker sex and like to gossip more so insist on a few more breaks each day, (a good chance of picking up new work by the way).
If your husband respects all your hard work he should take time to remember you're a woman as well as his wife & mother of his children and cut you some slack instead of cracking the whip at work otherwise he may find himself going solo.
Obviously you love him very much otherwise you wouldn't help him out so much in this physically demanding job. The things you do for love, eh
