TRIGGER WARNING / sexual abuse

So let me start by saying I was abused from age 2-16 by my brothers. I am very sensitive and very orotective over my daughters because of this. My SO knows this. Lately he has been having erections(“morning wood”) for longer than normal, he’s been more touchy with the babies & I’m starting not to want to leave the room when he’s with them.. they are 8mo , how do I go about this? I don’t want to break up my family for no reason but also don’t want anything to happen to my babies. Advice please. SOUND ADVICE, NO JUDGMENT.