DSD (16) is supposed to do a chore. She isn't doing it, she is telling her Dad (DH) that she is. I know she's not doing it because the tools she had to use have not been touched and I specifically looked at their set up (yes to check up on her I guess). DH is adamant that DSD would never lie, so if she says she's done it that's good enough for him. This annoys me because a she's lying and b the chore is hers and I have to do it for her when she's not with us - it's a massive favour and yet she can't be arsed to do it herself. But if I tell DH how I know she's lying I look like I didn't trust her (which I didn't and with just cause but it's not nice to hear that your DW doesn't trust your DD is it!) WWYD?