my fiance & I have been together basically 6.5 years but we did separate about a year & a half ago…

my fiance & I have been together basically 6.5 years but we did separate about a year & a half ago for about 4 months & he did have a fling with Someone else (so did I) but we been back together over a year & our expecting our beautiful son & our relationship is better than ever.... well my mil is the devil & I can't stand her but she tries act like she likes me (phony as hell ) well i just found out she's all buddy buddy w/ the girl my man was fooling around with when we were separated.... wtf!?!? not okay!!!