This chapter left a really bad taste in my mouth. Ecchi aside, she really overstepped her bounds and went ultra petty. MC should have expected this coming considering how everything led up, specially considering he still is close enough to have parents visit.
Hope the father puts both of them in their place because it's pretty clear both are fairly toxic to each other. A guy on the rebound who thinks with his Johnson and an ero mangaka who seems to have bpd like some middle school brat.