i would just change the locks and if they come over and try to get in, they will find out they can't ... that puts the onus on them to then ask you about it. . .

M 20+ T25+
S ~15.5 (BD)
BD 4/6/15
D 12/23/16

"Someone I loved once gave me
A box full of darkness.
It took me years to understand,
That this too, was a gift."
~ Mary Oliver