LW1 don't give your inlaws money for the item or purchase the item for them. Don't allow SIL to pressure you. I get that SIL and her husband are resentful o you not helping out financially. However, it is their choice to pay the mortgage and bills. You shouldn't be responsible for the choice they made. Just because they choose to give your inlaws money doesn't mean you are obligated to do the same.