Introducing new kittens in the house

by Marie M
(Australia)

Hi We have a 12 year old blue point Siamese neutered male cat who is now the love of our lives since his beloved brother died last year. He has been very anxious since then (obviously separation anxiety) and is very attached to both my partner and I. We now have taken in 2 stray kittens - we sadly had to trap their homeless mum and take her to a petrescue vet. She had been in our street for a year and these were her 2nd litter of kittens. We couldn't bear any more to be born and at that time we also had a german shepherd dog and the 2 siamese so we couldn't take her in. Since then she had this new lot of kittens (about 4 months ago), our lovely dog died and then the Siamese. We have the littlies in one of our bathrooms (they don't have the run of the house yet)and we want to introduce them to our older cat but every time he sees them (only a glimpse thru 2 doorways so far) he runs and hides. We are afraid he will start peeing everywhere as he's had a lot of changes to deal with in the last few months. They are very sweet kittens, purring all the time although still a bit scared from living on the streets. Can you suggest the best way to intro them? Also one is male and one female so we know we need to get them neutered soon - should we do the boy first or get them done at the same time?