Haha I knew that I couldn't be the only one who wasn't digging the whole Mei/Pres stuff. Totally agreed with Lilliwyt here tbh, this author's writing isn't really the best for romance. This could work pretty well as just dumb and fun fan-service, and not that it isn't much more than that by this point, but stuff like actually declaring the intention of at least a more real romance comes as cheap and poorly written, at least imo.
That aside, author went all out with this chapter, it was quite the surprise to see them going full lewd into this series compared to how tame their previous work have been, where it has mostly been teasing and racy jokes.