The audacity! The nerve! How dare they turn a personal sanctuary into a public restroom for a baby? The sheer disrespect of allowing a child to urinate on someone's bed, and then having the gall to berate the owner for being upset is beyond comprehension. The family's blatant disregard for boundaries is appalling.
While the urination incident is unfortunate, OP's reaction seems disproportionately dramatic. One might even suggest OP is using this as an excuse to fuel ongoing family drama. Perhaps OP enjoys playing the victim, exaggerating a minor event to garner sympathy and attention. Grow up.
The father's actions were disrespectful. Offering someone's private space without permission is a clear violation of boundaries. While family harmony is important, it doesn't supersede individual rights to personal space. The parents should respect the OP's boundaries in the future.