This is my opinion cos obvs I don’t know them ha but I think Helen is very jealous of how loving Chet is towards Ocean, she is clearly very childish and needy and I don’t think she likes it when his full attention is on Ocean and not her. I had a friend the same that was really jealous of her partner and her step daughters relationship and I get the same vibe from Helen. Chet is clearly saying ‘look, look’ when Ocean is trying to crawl and she doesn’t even respond, it’s weird. Maybe she’s desperate for another so she’s got one all to herself!