Having Parasocial Relationship with Fictional characters while being in relationship is horrible for the partner. And forcing/pressuring your partner to act like a fictional charcter without considering his feelings is similar to a guy forcing his wife/girlfriend to do porn like sex.

https://np.reddit.com/r/LoveAndDeepspace/comments/1j2x2p1/comment/mfxg2gt/

Just because its fiction doesn't means it won't affect your partner. People have insecurities. Just because it is normal to you doesn't means it's same to your partner.

She should assure them and then share your feelings of spicing up your romantic life with what you learned in game. If you make them feel like the relationship Lacks something, don't expect them to not get pissed.

Expecting a guy to act like male character in romance fiction is like a guys expecting his wife/girlfriend to have porn like sex or wild sex. You are lucky if they are fine with it. Your more lucky if you didn't even had to ask them for it. But if they feel u comfortable or bad about it, you have to assure them it's ok. If they still say no, accept it and decide weather you would like to be in the relationship or not. But you have no right to judge them for their decision.

If he crosses his limits or forces you to avoid them, then its a his problem. Leave it or compromise. But leaving would be better for yourself.

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The comment above is kind of sad. But the husband has lashed out so cannot pity him. Its just effed up.