The naughtier pictures are on DCS' (which is me, hi!) private patron blog, which needs a $5 pledge to access. It comes with the pics mentioned, and then hundreds of other cool pics too!
That's fine to hear about preferring yuri, but surprise! DCS (me again, hi!) actually drew all of the kissing, hugging, and lovin' in Mermaid Splash! ;) All of the CG's in the game were drawn by DCS (as well as the character designs, story, etc) and all of the busts (and writing and coding, etc) are by Nami-- so it's a yuri-fest from the both of us, combined! (Yay for Sofdelux!)
And again, all of that stuff is included in the PDF for this game-- so if you wanna see that stuff, play the game or get the PDF!
Regardless-- that's fine if you aren't interested in pursuing the images on the private blog of DCS' patreon, so instead I'm going to recommend Nami's explicit comic, Delicacy, which you can get for the same price.