Good effort, I might have cut out "give me" as extraneous, and used "make me squirt!" because I like the sound of squirt vs yogurt, and it carries the parallel of gf ingesting something but cousin expelling something, but that's more a matter of taste. I like the inner rhyme of Chobani and "make me"
Shrew gf: Chobani yogurt. 2nd cousin: make me squirt!