Sarah I make cakes too but tbh not many lately promised dcs no cakes over summer holidays now I dread the thought of them, I stress too much for all the money I make, have to make BIL 40th today, I have a page on fb
On subject of in laws mine aren't too bad but my own df is a different matter, all I will say is he hasn't seen my dcs from dd2 was a day old, after throwing a tantrum in hospital over our choice of second name needless today it was the icing on the cake for me as he had ruined every major life event I told him I wouldn't visit his house until he apologized which he refused to do,
Cut along story short many things have been said and done since and it has past the point of no return for me, I don't even know if he knows I'm pg now and don't care
Names I won't be able to discuss names in rl as my sil and bf are both due in Feb, my other sil is due in 5 weeks so everyone is afraid to share 
Hermione fx for you, although the rhesus thing is more of a worry for subsequent pg if this babys blood mixes with yours then your body will build antibodies against it and attack any further babies that is why the the need for the injections to mop up any anti bodies, hope that makes sense, can you tell I was a biologist pre dc and cakes and working for dh