My Nanny Kids Dad Calls Me Cute

I 18(f) have been a nanny now in 3 different homes, with three different families. But this family I’m with now has me here for 8am~6pm daily, I’ve been with them 3 1/2 months. There 3 year old son often tells me. “ My Dad says your a cutie pie” or “ My dad says your beautiful”. And I always just kinda brush it off. And change the subject with the little one. However this last week the little one ran to me when I first walked in. The dad was explaining something to me I don’t even remember. I was twirling his son he was hugging me a grading on to my leg and I was messing around with him while listening to the dad, Just trying to play. I was wearing a loose top nothing revealing or anything and between him being on my leg like a monkey and me leaning over him. He caught a glimpse of my bra. And announced it. Of course embarrassed. I just kinda said “ oh yeah mister monkey” and kinda tickled him. Trying to not metal in it. And then the dad said, oh yeah ( sons name) what color is it? I should add this mom and dad, have often joked about not liking each other and I’ve heard comments to make me think they are not in the best place. And stuff like” I have a working wife and a house wife” referring to me. Which makes me even more uncomfortable. Considering his comment. It’s just douche baggy. My Question is has a young lady how do I navigate this. This isn’t a post about my troubles with the job itself but some other factors have made me decide to leave in February make it my last month. I think I just have a little fear about further comments, that make escalate to something else. I had in incident with a dad at my first nanny job that made me leave. If I tell them I’m leaving the first of march and something happens do I just leave? Leave the mom in a bad position?