Will you be okay with this

So my boyfriend dad pass away two weeks Ago and yesterday was the funeral I been fully supportive, shopping., clean the house, make sure everything is set and ready for the wake( we did it at home) even food for the repass and after the viewing of the body! All his exes showed up even to his house which I have no problem. However I left around 6 during the viewing because I had to get the food I ordered so when I got to his house his ex was there, she overstepped and in front of me one of the family members ask if she’s sleeping over she said no the family members said but u know where to go in his room, I feel some type of way the same time, but I continue to help everyone, then at the funeral she was there hugging him and I’m standing there couldn’t say shit because it’s his dad funeral didn’t want to created a scene, however today my uncle came over and give me more information on what happened after I left his house after the viewing she was all over him, she even went to his room but couldn’t get in because his son locked the door when she saw me she left yes he was in the room! Thinking about all of this makes me sad like what’s really going on between them, him and I been together for 4 years and now I feel like to run away from it!!! Didn’t even know they were talking