My in-law often leaves their child with me to look after. How do I say no kindly?

Helping to look after a niece or nephew is a kindness, but you have the right to say no kindly when it becomes a burden. Distinguish between occasional help and a standing responsibility that affects your own family. Say politely that you are not always free, without feeling guilty. Offer particular times that suit you if you are able and willing. Avoid letting yourself be taken for granted to the point that your own children's needs are neglected. Discuss it with your spouse so that the refusal comes from the family, not from you alone. Saying no wisely protects the relationship better than bottling up your feelings. See in-laws.