What does XF stand for?

Me:41 - LBH in apt
W:39 - WW in home
Kids:D(15), D(11), S(9) - custody % 58/42
M: 15 yrs - DoS: 10-11-15
(PA confirmed 2-12-16; WW dumped by AP 11-6-15; WW dated 7-8 men in Jan '16 via Match.com)