I have no objections to polyamorous sex or open marriages if all parties agree. There is no crime in that. People should be able to enjoy whatever with mutual consent. Now if your partner doesn’t consider it acceptable, then it becomes an issue. Perhaps relationship needs to end if it becomes unsatisfying for you and alternatives are not acceptable for her

What made me wonder though when people suggested that you masturbate when sex isn’t available, you said that you are very religious and consider self-satisfying to be a sin.

If that’s a sin and you can’t even do what is the very basic private thing by yourself, how do you reconcile it with your religion that you’d be engaging in sexual encounters outside of your marriage? Would they not consider it a sin?

I don’t care about religious aspect myself when it comes to sex but you said you do so I wonder if your religion has opinion on sex with others while married? Wouldn’t it be even bigger sin than do something by yourself in private that doesn’t involve anyone else?