It may help to limit or even temporarily cut contact with those who are trying to pressure you into something you do not want to do. Hopefully, it may help them realize that what they are doing is damaging to the relationship you share. Manipulating someone using guilt tactics is a horrid thing to do and can lead to mental health issues down the road. Just tell them "I do not want kids and I can see through your blatant manipulation. Stop it or don't talk to me in future. This is my choice and I have made it." I hope they see the error of their ways. No one should be forced, in any way, to do something they do not want to do.

Ask her when she starts having dogs so you can have someone to hang out with.

Just as long as you're ok with screwing over your nephews and nieces. And cheating your mom out of grandkids. It's not there's ever going to be a chance for payback when you become, say, the lonely spinster aunt.