Gf (F26), always wanting to touch me (M26) and always demanding for second round

Hi. So my gf always wants to touch me whenever she have the opportunity and her reason is because she love it. It’s nice once in a while but it’s almost everytime when we meet she does that and when I say no, she force her hand to my pants and gets mad when I say no too many times. She would then say things like is it I don’t like it or she’s not good enough and etc.

When it comes to bed, after the first round, we would play around with dildo and i’ll make sure she cums multiple times before stopping. After we’re done, we’d lie down next to each other and probably 5 mins later, she’d start touching me and wants to go for another round. I’d say no at times and she’d say that she’s just touching and she would eventually force her way on top despite of me saying no. She would get mad if I say no too many times and throw tantrum. Sometimes she rides on me on our first round and sometimes I’d be the one doing it. If I don’t do her on the first round, she’d say I never do anything. If I do her on the first round, she’d say she never do anything. And when we both takes turn on the first round, she’d say she wants more.

Is there any way to deal with this effectively? I’ve tried telling her that I’m tired, tried hinting her that if same things happens too many times then it’d steal the fun away and she agrees but I don’t think she quite get it.