You chose:

1. You take no action, disregard his comments and continue as before.

Your position there is under attack they are using your gender as an additional reason to reject you, and you will have to leave the sales team. As the senior salesperson is likely very influential in the informal group of sales personnel, your postion there will become increasingly uncomfortable and unpleasant, as you have challenged him directly. Ultimately, your connection with the firm's ownership will become known. It represents a form of hidden supervision of sales personnel, and the sales manager and other team members will considered it unethical on your part.