nope, the fucking's been quite rough, the teasing heavy and the internal-conflict of MC has been nicely played (could have been better if it was drawn out more but the NTR warts would flare up again...). "sharing" has started, a while back already with an awesome public disgrace type scene

, but, thankfully, didn't jump into fucking directly (would've shat up the whole buildup and essentially rendered the story over).
I'm just answering specifically whether love interests have
fucked other guys yet

...
Aside from GF, there's at least two relatively rough scenes with voyeurism, one involving mc but oral only, the other has fucking (com to think of it, technically the latter is now LI).