Boyfriend son spent the night

I’ve been with my boyfriend for almost 12 years on Nd off over a year ago I found out that he cheated on me n got a girl pregnant. It was a difficult time obviously.... fast forward to now ... the boy is almost a year . For the first time he Nd his son spent the night ... it was mad crazy seeing them sleep in the bed next to me... what’s even crazier is I lost my baby at 17 weeks a few weeks ago so technically I should be 6 months at this time ... idk how to feel .. I know the boys mom would never approve because me Nd her don’t like each other ... she actually had a restraining order against me lol .. life is mad crazy