Two separate issues here, Coco: contacts and offers.
1.
Contacts. The recruiting school can't initiate contacts with underclassmen. Starting in the prospect's junior year, the school can contact the player only according to
the recruiting calendar.
As you see, right now we're in a Contact Period. That's why Geno and CD can go on a home visit. You can look up the meanings of the other three periods, but they're about what they sound like.
Note that we're talking here about in person, off campus visits, generally to the player's school or home. Phone contacts are permissible, within the rules, starting junior year.
Here's a chart of what's permissible and when.
Indirect communication, expressions of interest, etc., can always be had through third parties such as the HS or AAU coach (but not through family members; they're as off limits as the player).
Note further that the recruit can always initiate a contact, and can always come to the campus on an unofficial visit (i.e. on her own dime). Official visits (i.e. at the school's expense) are limited by extensive rules.
2.
Offers. The school can make an offer anytime it can get through to the player, whether in person or otherwise, according to the contact rules. And the player can verbally accept such an offer anytime. I was positing that Geno as a matter of preference would want to make any offer in person and so could well have done so at the home visit, absent a player visit (unofficial or official) to UConn.