Boyfriend sleepover ??

So my mom wants me to be honest with her so she knows about my vibrators but doesn't know that I have oral sex with my boyfriend. My brother is moving out next year for college and I'll be the only child. Should I tell me my and aks her about having my boyfriend spend the night and possibly get shut down and lost trust in when home alone OR lie and sneak him in but then have to hide him ??? Pls help me