Our Daughter And Son In Law Were Planning To Come

Our daughter and son in law were planning to come to our summer home tonight for a nice vacation at the lake. However, she called and informed us that at least three of the kids have head lice! She is treating them with OTC shampoo products but we are afraid it's way too soon for them to be coming over, as we don't want our house subjected to the lice. We think it's better to postpone the vacation to a later date until we know the head lice problem is eliminated. Your thoughts on this?