1. The house is entirely a proxy for the LW's affection and attention.
2. Isabella is pregnant with her first baby. She is probably really missing her mum and her dad is wrapped up in a new relationship. That has got to really sting.
3. First pregnancy is also a period when everything feels uncertain and Isabella clearly wants to nail things down. It's also a time when you have limited emotional bandwidth for anything other than the baby.
(2 and 3 are based on my experience, other people may feel different.)
4. Both LW and Isabella are communicate by issuing ultimatums. That's not going to resolve the situation.
I think if LW doesn't put some serious effort into restoring his relationship with Isabella, it is going to break down irretrievably.
Observations
2. Isabella is pregnant with her first baby. She is probably really missing her mum and her dad is wrapped up in a new relationship. That has got to really sting.
3. First pregnancy is also a period when everything feels uncertain and Isabella clearly wants to nail things down. It's also a time when you have limited emotional bandwidth for anything other than the baby.
(2 and 3 are based on my experience, other people may feel different.)
4. Both LW and Isabella are communicate by issuing ultimatums. That's not going to resolve the situation.
I think if LW doesn't put some serious effort into restoring his relationship with Isabella, it is going to break down irretrievably.