Confession of a Curious Doc

I just found out I'm into DDLG with my wife. We're both 35 and this is our first time exploring it together. It's wild, seeing her in a playful, younger role, she calls me 'Daddy' now, which does funny things to my libido. Last night was intense: I tied her up, blindfolded her, and had her sit on the naughty stool as punishment for forgetting to pick up milk. She giggled through it all but didn't fight back at all. Is this normal? Should we keep going with this?