Worried about Lola's pregnancy

So I have a grey and white cat called Lola that was born on the 1st of April last year. I live in the UK but I have always kept her as a indoor cat due to my last cat getting hit by a car. She came into heat on January the 1st and we decided it was time for her to be spayed. We had always put it of for some reason, I guess we felt kinda guilty for some reason hehe. So after her first heat she went out of her for about a month. She didn't come back into heat u till February the 13th. The plan was to get her spayed but because she didn't come back into heat again for ages it just slipped to the back of our minds. Well my mum went out to the shops and left the window open by accident on the 14th. She escaped outside and I can't say how long she was gone. We had no idea until we saw her meowing outside the window to come back in. As she was meowing to come in she attracted the attention of this grey bsh cat that lives down our road. Now he is Definetly not neutered because we have seen him being a bit busy with a few other cats in our area. At the time we thought shes probably only just escaped. But a few weeks on after seeing her nipples pink shes developed quite a big bulge. She's deunetly pregnant. If I've calculated it right shes due around the 19th April. I feel so rubbish. I've always been so responsible when it came to my pets and have always never thought I would never be "the pet owner" who would have his issue. But here I am...and i feel so embarrassed and ashamed. Please don't be angry lol at me. My vet talked about aborting but said she rather wouldn't. I never wanted to anyway. I'm just really worried that shes not gonna be able to expel all of them causes she will have just turned one when she delivers. The vet said she could feel about 5-6... She asked me if she had already had a litter because that's quite big for a first litter. Any advice? I have already ordered royal Cain kmr and a 1ml syringe.

You should also get a scale so you can make sure each kitten is getting enough to eat. 5-6 kittens is a big litter.

Mom and babies can all be spayed/neutered when the kittens are 8 weeks old. Mom will likely go into heat before then, so it's essential to keep her inside.

Yes I will definetly be keeping her inside. Forever. I don't want a repeat of this or what happened with my last cat ever again. I am gonna get her spayed and the kittens microchipped and vaccinated before they leave. So far alot of family and friends have expressed interest in them so I hope homing them won't be a problem

Lola's nipples are quite big. But the area around the nipples are quite big as well. Should it just be the nipple that ponks or the area around it as well.

Can you get a photo? Is it like swollen and red or just pinkish? 

The whole area can become pink. If it appears dry or chapped you can apply some olive or vegetable oil to the nipple and surrounding area. Keep us posted on her progress! [emoji]128522[/emoji]