What happens when the next time she finds texts from you on his phone and she decides to come after you or your family instead of beating on him? You need to consider protecting yourself and your existing family.
Metamours are important.
Love is that condition in which the happiness of another person is essential to your own...
Robert A. Heinlein
Me: female, bi, (formerly hinge of a vee)
with FirstBoyFriend (FBF)(moderately long-distance)
and no longer with CurrentBoyFriend (CBF)(who lives in the apartment building next door)