If the invitation from Cathy is not to be used to organize the bachelorette parties, the event, because this is a porn game, could be used as the beginning of a causal chain for a swinger event. Others suspected that too. I thought that was pretty unlikely so far. Both Sophia and Liam have not given me any recognizable indication that they are interested in such an event. Liam is more of the jealous type. He wants to notice the other his wife, it makes him appear more glamorous, but he definitely doesn't want to share her. Even if he likes the idea of having sex with Cathy, he will not be able to enjoy the fact that Sophia has sex with Andrew in the next room. Sophia herself is more open sexually, but in my opinion it would be a long way for her. Becoming a swinger requires a lot of trust and time if you don't want to endanger your relationship. If L&P wants to hold on to its "conditional realism", it is difficult to convey it credibly. Now this is a porn game with clearly defined goals and no deep psychological analysis and a remark from the developer comes to my mind who once wrote "Sophia will have the first extramarital sex with a man that nobody expects". Now after this invitation it seems to me possible that Andrew could be this man. But the timeline for Sophia and Liam would actually be too short to go from 0% to 100% in just three or four days and the route would be complicated.
It could be suggested to go out separately with the sponsor de each other. If Liam makes the mistake of agreeing immediately, and Sophia has just cleared his gambling debts, she could agree out of disappointment.