Patricia and Sophia visit her friend Zoey's ranch.
This event will take place in any case [meaning Boarding school or not, Ed.*].
Either Patricia tells Sophia about it on Day 18 after yoga or she will call her on Saturday. What will happen there depends on Sophia's lesbian points and her relationship to Patricia. (source)
* Note that in the boarding school route Sophia didn't get the invitation from Patricia because they could not stop at Zac's and have a chat while Dylan visited him. In that case, she will got the call on Saturday. The ranch event cannot happen on Alyssa's route (alternative to the yoga event) as Sophia cannot get the 2 Patricia points awarded in the yoga event and get to the required 14 points.
It will be "one large event which spreads over the morning until the evening" (source)
and it will cover 3/4 of the day (source)
Meeting "museum college guys"
* Not a lesbian oriented event (source), rather straight (source)
* Something interesting is planned (source),
probably only one-time event (source)
with likely no repercussions on the story (source),
* there won't be sex (source)
https://f95zone.to/threads/a-wife-and-mother-v0-190-lust-passion.5944/post-8120982