1st:
For me, these scenes happened as follows, I had to first do the two MC missions trying to masturbate and after what had to happen in the missions, on Sunday morning I chose to go straight to sleep and then all these events happened (vibrator, Mônica's blowjob, rubbing the MC's penis on Anna's ass).
NOTE: perhaps this confusion in Mônica’s scenes:
(dildo, blowjob
Monica, rubbing the MC's penis against Anna's ass). It may have happened because during the first mission the MC tries to masturbate and in the second mission, between them the MC receives a blank message from Mônica.
2nd:
After Monica's scenes,
exit the MC room, interact with the dog and you will unlock the park.