Discussion: We are a married couple in their 40s. My husband wants us to bring a girlfriend (who agrees) to come and watch us have sex. I want to please my husband, but I am afraid.

Your concern is justified. In the passionate passion for the sexual act, the other woman's viewing of the sexual act may turn into a threesome event. Jealousy between spouses is a primary emotion designed to preserve the relationship. Infidelity (even by consent) emotionally breaks the emotional loyalty and marital bond. You can think about fulfilling mutual sexual fantasies with your husband, but if you involve others, you may regret it later.