Seriously shaking my head at some responses. Frankly I'm wondering how many people REALLY understand how academia works?
I'm a product of three Russell Groups. (I know, I like to swank), a Fellow of the Royal Astronomical Society (amongst others). Co author of two papers in Materials Science (Physics is my field) and more importantly, a mum of two.
OP is right to be worried. It's an abuse of power and its not on. That's number one. Number two is that if he was lecturing her during the undergrad that's a WAY BAD conflict of intrest. I'd go further and say did he have a hand in her going post grad?
You know the post grad sector really do things there own way. In fact, from mine and my ex-H experience ; they do all sorts.
It's fucking crap because I'll wager any money that your DD is outstanding in her field. And she has you for a mum.
Number three. Scoping for skirt during lectures is extremely predatory behaviour. Hell have done it before. Believe me, I use 'skirt' with all due prejudice. We are nothing to males who do this.
You are right to query about flagging this. I agree with PP, don't. Horse has bolted. He's not under their employment. In any case. I'd warrant the person who you'd complain to, such as faculty head, already knows what creep has done hence why he's not there.
I feel for your DD. She needs to get away from that twat. He'll drag her down. But heres where you csn help. Just be there. Talk to her. Raise your concern but let her be. I would say that it would be worth telling her your concerns so that 1 -she's aware and 2- you've absolved yourself of the inevitable conversation years down the line, 'Why didn't you say something, Mum?'
You did. You have.
Feel for you OP. x
Don't underestimate the ties behind the scenes that you cannot see right now.