Rachel (Foster) from New Zealand

I am looking for my sister Rachel who is from New Zealand. She has been in the UK for 21 years. She married and became Rachel McCall. She separated and then her ex husband died. I don't know what was last name she uses now. She has 4 or 5 kids. Youngest that I know of would now be just over 1 year old. I think she was going to name him Jay - same as the Dad.
Also last I knew she was living in Middlesborough.

Please help me find her. Our Dad isn't in the best health and I'd like to make contact before its too late.

Wendy from New Zealand