While your spouse is cheating with someone in their social circle, they may not want you in their social circle. To avoid suspicion, they may offer to hang out with you and your friends. This hides the fact that they don’t want to be with you. It’s a common tactic to hide the fact that they are up to mischief when they are with their friends. One more thing to consider is that if they always want to hang out with your friends, it’s possible they are cheating on you with one of your friends. This allows them to interact while you are around thereby avoiding suspicion.