Racy swim attire for beach time fun; ignore them, run them off, or run away?

You are going to a beach potluck with friends and acquaintances. Everyone brings some food, and gather to eat 15 minutes after the set arrival time then spend the afternoon with some fun, sand castle building contest, volleyball, etc. Mr. “L” shows up agitated, he says he just seen Ms “P” getting drinks at a quickie mart on the way when he stopped to get ice. Ms “P” is a young mother and was very young when she became a mother; she is 29yr and her daughter 13yr. She fancies herself still a party girl and still hot, she works out quite often and is quite toned and free spirit unashamed of her body as she raises her daughter also. Mr. “L” says “Hey, I just seen Ms “P” and her daughter “M” and she is wearing that (_looks similar to this) one-piece again, and her daughter is wearing that barely there bikini (looks similar to this) again, (expletive).”_

What do you do, ignore them, rob them of any attention they might gain, band with the disgruntled to make them feel unwelcomed until they changed or left, or make an excuse to beg off and leave yourself?