IN-LAWS DO NOT WASH THEIR HANDS AFTER USING BATHROOM

My in-laws do not wash their freaken nasty hands after they use the bathroom. So yes, after they wipe or touch their genitals they flush the toilet and leave out the bathroom. It is seriously so disgusting! My mil will always try to cut up fruit and hand them to me to eat. Ill grab that plate and say thank u and then throw that shit out when shes not looking. I would always have to sanitize handles, light switches and etc before touching them. I complained to my husband about this and he thought i was joking as he works long hours and doesnt see them during the day. He finally noticed and told them repeatedly to wash their hands WITH SOAP. And they still dont. So now im not going to be the nice daughter in law and will tell them straight up because my daughter is due in a month and can come any day now. If she gets sick because of getting nasty feces/urine in her mouth i am going to be a very angry mom and it aint gonna be pretty. Like damn, how hard is it to wash ur hands!?!