MIL and Roaches

Omg sooo annoyed and grossed out! So a few months ago we had to bring my mil her keys because she locked herself out. She is staying at one of her properties she is fixing up. I had to pee really bad because it was a 2 hour drive so I went in to use the bathroom. Roaches EVERYWHERE I'm really not good with bugs. So I pretty much freaked and ran out of the apartment without using the bathroom. So I know she is living with a bunch of freaking roaches. Here is my problem. A few times after she has been to my home I have found a random roach crawling around. And just right now I saw one crawling on my wall (she was here this morning). I just texted my husband he needs to check her purse b4 she comes into my damn house! If she brings one that is pregnant bam infestation. I cannot handle it! I don't know what to do. Even though I told him to check her purse from now on I know he won't and actually I feel awkward telling her she can't come over or that we need to check her for roaches. I have no idea what to do. It's not helping my pregnancy hormones are going crazy. What would you guys do if you were me?

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Thank you for all your suggestions and replies. I spoke with the hubby and he will speak with his mother. I pretty much told him he needed to or I would and his mom can be really sensitive about certain things and doesn't speak English very well so it's better he talks to her about it.