Pee on my hand

Since my week off, I am learning that I am appreciated at my job, but for who I am, not for the work I do, at least when it comes to the father. The parents really like me. I knew the mother (L) did, but I questioned what the father (P) thought of me. Last week when L and the kids were gone, P was going out of his way to invite me to things. First he invited me to a Strong Man competition, but I said no. Then he invited me to a car show. I had made other plans (with myself), so I said no again. That night, when I returned home, he invited me to a movie. I agreed because I would feel bad saying no again and it was a free movie. At first I felt weird about going to a movie with him, but I am friends with L, why can't I be friends with P too? I realized that he enjoyed my company, which was nice to finally know after 7 months of working here. But yesterday was when I realized he takes me for granted when it comes to my job. We got home from gymnastics the same time as he got home from work. When I was taking things out of the car, I did it slowly, hoping he would come over to help. Eventually, I had the diaper bag, S's clothes, her trash and Baby S in the carseat (between her and the seat, it easily weighs 25 lbs.). He didn't unlock or open the door to the house, I had to do it with my hands full. I was starting to put stuff away, with Baby S patiently waiting to be taken out of her carseat, when S rushed in. She had to go to the bathroom but she had a leotard on. I was helping her take it off when the accident happened and she peed all over my hand. P came in to ask what happened and I told him that she also peed on the floor, so I said he should clean it up (I actually said that). I washed my hands, then took S's wet clothes upstairs and got her clean clothes. I came downstairs and there was still pee on the floor and Baby S was still in the carseat. P was doing his own thing. I got stuff to clean the floor and finally P took the baby out of her carseat. I cleaned the floor and then helped S put on her clothes. Then I finished putting everything away. And P just stood their looking at the mail with Baby S in his hands, with her hat still on, even though she couldn't see (she tries to pull it off, but their is a strap under her chin, so it just ends up over her eyes), so I took it off her. I understand that I am the nanny, I am supposed to take care of the kids. However, my job is to take care of them until the parents come home and my day technically ends at 6:45 pm (it was 7 pm when all this happened). And I don't mind doing all those things, I have to do them all day by myself anyway, but the point is, he was there and didn't lift a finger. I see why L often complains about P not helping out on the weekends, if this is what she always has to put up with, it would get old fast.