Unsure about this.

So Friday night my SO got pretty buzzed at my birthday dinner. I'm pregnant so I want sober. We got home after dinner and started having sex. Well we were doing the usual. I was tied up and doing as I was told. 😈 well being six months pregnant I all the sudden had to pee. I asked him if I was allowed to use the bathroom. He said yes. But didn't untie me. And followed me in there. He turned the shower on and made me get in. He told me to face the wall and made me pee in the shower while he watched. Then shut the shower off and told me to get on my knees and blow him until he came. I'm totally happy with being told what to do and having him in control. (It's such a turn on) but I'm unsure about the pee thing. Is that normal? Does anyone else do this? I'm not weirded out by it. It just took me by surprise.