Here is the full list of all 20 Wet Waifu achievements.
Open picture 2
Open picture 1
Open picture 3
Open picture 4
Open picture 5
Open picture 6
Open picture 7
Open picture 8
Open picture 9
Open picture 10
Open picture 11
Open picture 12
Open picture 13
Open picture 14
Open picture 15
Open picture 16
Open picture 17
Open picture 18
Open picture 19
Open picture 20