You can't prevent a possible future closeness between your upcoming child and one or more of their grandparents.

The mere idea of asking a family member if they intentionally stopped sending me an annual bonus makes me feel like breaking out in hives.

Tenancy laws can be so complicated; I want to make sure OP is protected as much as possible.

It is so tempting to return rudeness with rudeness!

An adult woman should not be so possessive of her own birthday that she begrudges her friends the chance to get married on the same day.

You are allowed to draw lines even if your feelings are irrational. Part of the marvelous business of being an adult human is that you get to set your own boundaries for whatever reasons you like, without appending a sensible rationale to them.

It should go without saying that you are not doing anything wrong by having sex in your own home, and based on the care you've taken to keep things relatively quiet it's unlikely that you're violating any city noise ordinances.