A word on thresholds. For the most part, thresholds aren't that dangerous. At least, you won't be destroyed or slowly disintegrated by a threshold, so you've got that going for you over certain monsters out there. I've put up a
wiki page going over the basics of what a threshold is and what the mechanics are.
Both groups will suffer the effects of a threshold upon entering either home right now. The woman is not offering Keira and Logan an invitation, so entering will mean you suffer the effects of the threshold, and no one is there to invite Juno and Malcom into the other home, so the same with you. For homes like these it isn't going to be extremely taxing. I'll go ahead and tell you that both of these thresholds are only strength 1.
Specifically, this means that any numerical bonuses you get that are directly enhanced by your supernatural abilities are counteracted by 1 point. It also means that spells must get past a block of 1 or fizzle. Neither of these penalties is really that bad. If you were getting around a threshold 3 or 4 you would start seeing major problems with using abilities.
As an example, Inhuman Strength would normally provide you with a +2 bonus to damage. Because of the threshold this is decreased by 1 to become a +1 bonus only.
Things like Inhuman Toughness, however, generally aren't affected, as they don't have shifts of power associated with them. It is theoretically possible for a sufficiently strong threshold to bypass certain Catches, however.
A lot of the rules for thresholds are open to interprietation, so if you have any questions on specifics, just ask. The general rule is that if something has shifts of power, those go down by the threshold's strength and if something is an active power the threshold attempts a block. If there is an active opposed roll to something the opposer might get a bonus based on the threshold strength. Otherwise, the power is unaffected.
An important note is that often wizards put wards up around their homes by using the threshold as an anchor. It might be worth it to "check for traps" as they say.