See what's happening face with a vmapire sim

Hi, recently, my vampire sim created a love club for him and his human girlfriend. I set 'sleep' for club action and she started to sleep in bed I provided. And while she is in sleep, my vamp sim got into his coffin to sleep. 5 mins later, she suddenly got up on bed, then she made a shocked face seeing the coffin such as 'See what's happening'... So I removed the coffin, then I provided a double bed instead. I let my vamp sim in bed. She, 5 to 10 mins later, she lied in the double bed with him. And then...5 to 10 mins later in sim time, she made the same shocked face again to see my vamp sim. You know she already had made a woohoo with him in the coffin before going to sleep..? How can she be surprised to witness he is sleeping in the coffin? Do making love in coffin and sleeping coffin work separately? So I just gave up and ended the club.

A week later, I reopened the love club again. He hasn't had any woohoo over a week with her even in bed. There's no coffin at home since that time. She got to sleep like her home now, he lied down with her in the same bed. 5 to 10 mins later in sim time, she suddenly got up and made a shocked face again..!! I have no clue what's wrong with her. I just evicted her household and put them back in. Not sure it will fix her issue.

My question is... Will the human sims get shocked if they witnessed their friends open the coffin for sleep?