so my sister somehow got lice and now we all need to treat ourselves... anyone know if its safe to…

so my sister somehow got lice and now we all need to treat ourselves... anyone know if its safe to use lice shampoo treatment while pregnant??

***also , mini rant ****

my mom is damn idiot... knowing the situation , she is letting my sisters friend stay the night tomorrow. like are you seriously THAT dumb !!!?!?!?? what so now her friend can get them and take them and spread it around her house too?? fucking dumbass dude smh so hard rn its giving me a headache ! 😡😒 and also she let my sister go to a friends sleepover tonight.. I just can't even.. my sister did already treat herself but still. I doubt my mom combed through her head afterwards to check. if my child ever got lice I'd keep them out of others' homes until I knew they were gone !