Tammy and Jonathan already run from blown up safe house and currently hunted down by the brotherhood paladin and manage to lose sight of them but they're not exactly safe yet because the institute courser still could find them

tammy and jonathan manage to find another safe house of the railroad

a couple days later the railroad scout telling them BoS is withdrawing and leaving by vertibird

tammy approaching you This place security is sucks, good thing I'm here, the door is now only opened if you give correct password. why don't you guys adding that kind of security?, i honestly surprised that this place is a "safe house", when the security is almost abysmal..