Bikini Breeding My Wife's Naughty Little Sister

It's been a year since I last dealt with Kelsey, and in that time, I got my wife Lynn pregnant! Now my job wants me to take a quick vacation before buckling down, and I've decided to take Lynn to the beach. But Lynn decides to bring her sister along, and the little brat has decided that she wants to be pregnant again herself. Can I resist her in her teeny tiny bikini?