I hate my in laws

Sat at my in laws for new years and I really wish I wasn’t. Meant to be staying the night. Brought a blow up bed with us so my other half and our boy could sleep on it and I could sleep on the sofa. She’s just told me I’m not allowed to sleep on the sofa. So I’ve no idea where I’m meant to go. Think I might just go into the car and sleep in there as I’m clearly not welcome here. Unfortunately my boyfriend has been drinking as has everyone else so I’ve no way of getting home. Fuck these people!!